xref: /petsc/include/petscmat.h (revision 419c2fb8d764c7b6d5cfa75a78778d34da486dd3)

/*
     Include file for the matrix component of PETSc
*/
#ifndef PETSCMAT_H
#define PETSCMAT_H

#include <petscvec.h>

/* SUBMANSEC = Mat */

/*S
     Mat - Abstract PETSc matrix object used to manage all linear operators in PETSc, even those without
           an explicit sparse representation (such as matrix-free operators)

   Level: beginner

.seealso: `MatCreate()`, `MatType`, `MatSetType()`, `MatDestroy()`
S*/
typedef struct _p_Mat*           Mat;

/*J
    MatType - String with the name of a PETSc matrix type

   Level: beginner

.seealso: `MatSetType()`, `Mat`, `MatSolverType`, `MatRegister()`
J*/
typedef const char* MatType;
#define MATSAME            "same"
#define MATMAIJ            "maij"
#define MATSEQMAIJ         "seqmaij"
#define MATMPIMAIJ         "mpimaij"
#define MATKAIJ            "kaij"
#define MATSEQKAIJ         "seqkaij"
#define MATMPIKAIJ         "mpikaij"
#define MATIS              "is"
#define MATAIJ             "aij"
#define MATSEQAIJ          "seqaij"
#define MATMPIAIJ          "mpiaij"
#define MATAIJCRL          "aijcrl"
#define MATSEQAIJCRL       "seqaijcrl"
#define MATMPIAIJCRL       "mpiaijcrl"
#define MATAIJCUSPARSE     "aijcusparse"
#define MATSEQAIJCUSPARSE  "seqaijcusparse"
#define MATMPIAIJCUSPARSE  "mpiaijcusparse"
#define MATAIJKOKKOS       "aijkokkos"
#define MATSEQAIJKOKKOS    "seqaijkokkos"
#define MATMPIAIJKOKKOS    "mpiaijkokkos"
#define MATAIJVIENNACL     "aijviennacl"
#define MATSEQAIJVIENNACL  "seqaijviennacl"
#define MATMPIAIJVIENNACL  "mpiaijviennacl"
#define MATAIJPERM         "aijperm"
#define MATSEQAIJPERM      "seqaijperm"
#define MATMPIAIJPERM      "mpiaijperm"
#define MATAIJSELL         "aijsell"
#define MATSEQAIJSELL      "seqaijsell"
#define MATMPIAIJSELL      "mpiaijsell"
#define MATAIJMKL          "aijmkl"
#define MATSEQAIJMKL       "seqaijmkl"
#define MATMPIAIJMKL       "mpiaijmkl"
#define MATBAIJMKL         "baijmkl"
#define MATSEQBAIJMKL      "seqbaijmkl"
#define MATMPIBAIJMKL      "mpibaijmkl"
#define MATSHELL           "shell"
#define MATCENTERING       "centering"
#define MATDENSE           "dense"
#define MATDENSECUDA       "densecuda"
#define MATSEQDENSE        "seqdense"
#define MATSEQDENSECUDA    "seqdensecuda"
#define MATMPIDENSE        "mpidense"
#define MATMPIDENSECUDA    "mpidensecuda"
#define MATELEMENTAL       "elemental"
#define MATSCALAPACK       "scalapack"
#define MATBAIJ            "baij"
#define MATSEQBAIJ         "seqbaij"
#define MATMPIBAIJ         "mpibaij"
#define MATMPIADJ          "mpiadj"
#define MATSBAIJ           "sbaij"
#define MATSEQSBAIJ        "seqsbaij"
#define MATMPISBAIJ        "mpisbaij"
#define MATMFFD            "mffd"
#define MATNORMAL          "normal"
#define MATNORMALHERMITIAN "normalh"
#define MATLRC             "lrc"
#define MATSCATTER         "scatter"
#define MATBLOCKMAT        "blockmat"
#define MATCOMPOSITE       "composite"
#define MATFFT             "fft"
#define MATFFTW            "fftw"
#define MATSEQCUFFT        "seqcufft"
#define MATTRANSPOSEMAT    "transpose"
#define MATSCHURCOMPLEMENT "schurcomplement"
#define MATPYTHON          "python"
#define MATHYPRE           "hypre"
#define MATHYPRESTRUCT     "hyprestruct"
#define MATHYPRESSTRUCT    "hypresstruct"
#define MATSUBMATRIX       "submatrix"
#define MATLOCALREF        "localref"
#define MATNEST            "nest"
#define MATPREALLOCATOR    "preallocator"
#define MATSELL            "sell"
#define MATSEQSELL         "seqsell"
#define MATMPISELL         "mpisell"
#define MATDUMMY           "dummy"
#define MATLMVM            "lmvm"
#define MATLMVMDFP         "lmvmdfp"
#define MATLMVMBFGS        "lmvmbfgs"
#define MATLMVMSR1         "lmvmsr1"
#define MATLMVMBROYDEN     "lmvmbroyden"
#define MATLMVMBADBROYDEN  "lmvmbadbroyden"
#define MATLMVMSYMBROYDEN  "lmvmsymbroyden"
#define MATLMVMSYMBADBROYDEN "lmvmsymbadbroyden"
#define MATLMVMDIAGBROYDEN   "lmvmdiagbroyden"
#define MATCONSTANTDIAGONAL  "constantdiagonal"
#define MATHTOOL           "htool"
#define MATH2OPUS          "h2opus"

/*J
    MatSolverType - String with the name of a PETSc matrix solver type.

    For example: "petsc" indicates what PETSc provides, "superlu_dist" the parallel SuperLU_DIST package etc

   Level: beginner

   Notes:  MATSOLVERUMFPACK, MATSOLVERCHOLMOD, MATSOLVERKLU, MATSOLVERSPQR form the SuiteSparse package for which you can use --download-suitesparse

.seealso: `MatGetFactor()`, `PCFactorSetMatSolverType()`, `PCFactorGetMatSolverType()`
J*/
typedef const char* MatSolverType;
#define MATSOLVERSUPERLU          "superlu"
#define MATSOLVERSUPERLU_DIST     "superlu_dist"
#define MATSOLVERSTRUMPACK        "strumpack"
#define MATSOLVERUMFPACK          "umfpack"
#define MATSOLVERCHOLMOD          "cholmod"
#define MATSOLVERKLU              "klu"
#define MATSOLVERSPARSEELEMENTAL  "sparseelemental"
#define MATSOLVERELEMENTAL        "elemental"
#define MATSOLVERSCALAPACK        "scalapack"
#define MATSOLVERESSL             "essl"
#define MATSOLVERLUSOL            "lusol"
#define MATSOLVERMUMPS            "mumps"
#define MATSOLVERMKL_PARDISO      "mkl_pardiso"
#define MATSOLVERMKL_CPARDISO     "mkl_cpardiso"
#define MATSOLVERPASTIX           "pastix"
#define MATSOLVERMATLAB           "matlab"
#define MATSOLVERPETSC            "petsc"
#define MATSOLVERBAS              "bas"
#define MATSOLVERCUSPARSE         "cusparse"
#define MATSOLVERCUSPARSEBAND     "cusparseband"
#define MATSOLVERCUDA             "cuda"
#define MATSOLVERKOKKOS           "kokkos"
#define MATSOLVERKOKKOSDEVICE     "kokkosdevice"
#define MATSOLVERSPQR             "spqr"

/*E
    MatFactorType - indicates what type of factorization is requested

    Level: beginner

   Any additions/changes here MUST also be made in include/petsc/finclude/petscmat.h

.seealso: `MatSolverType`, `MatGetFactor()`, `MatGetFactorAvailable()`, `MatSolverTypeRegister()`
E*/
typedef enum {MAT_FACTOR_NONE, MAT_FACTOR_LU, MAT_FACTOR_CHOLESKY, MAT_FACTOR_ILU, MAT_FACTOR_ICC, MAT_FACTOR_ILUDT, MAT_FACTOR_QR, MAT_FACTOR_NUM_TYPES} MatFactorType;
PETSC_EXTERN const char *const MatFactorTypes[];

PETSC_EXTERN PetscErrorCode MatGetFactor(Mat,MatSolverType,MatFactorType,Mat*);
PETSC_EXTERN PetscErrorCode MatGetFactorAvailable(Mat,MatSolverType,MatFactorType,PetscBool *);
PETSC_EXTERN PetscErrorCode MatFactorGetCanUseOrdering(Mat, PetscBool*);
PETSC_DEPRECATED_FUNCTION("Use MatFactorGetCanUseOrdering() (since version 3.15)") static inline PetscErrorCode MatFactorGetUseOrdering(Mat A,PetscBool *b) {return MatFactorGetCanUseOrdering(A,b);}
PETSC_EXTERN PetscErrorCode MatFactorGetSolverType(Mat,MatSolverType*);
PETSC_EXTERN PetscErrorCode MatGetFactorType(Mat,MatFactorType*);
PETSC_EXTERN PetscErrorCode MatSetFactorType(Mat,MatFactorType);
PETSC_EXTERN_TYPEDEF typedef PetscErrorCode (*MatSolverFunction)(Mat,MatFactorType,Mat*);
PETSC_EXTERN PetscErrorCode MatSolverTypeRegister(MatSolverType,MatType,MatFactorType,MatSolverFunction);
PETSC_EXTERN PetscErrorCode MatSolverTypeGet(MatSolverType,MatType,MatFactorType,PetscBool*,PetscBool*,MatSolverFunction*);
typedef MatSolverType MatSolverPackage PETSC_DEPRECATED_TYPEDEF("Use MatSolverType (since version 3.9)");
PETSC_DEPRECATED_FUNCTION("Use MatSolverTypeRegister() (since version 3.9)") static inline PetscErrorCode MatSolverPackageRegister(MatSolverType stype,MatType mtype,MatFactorType ftype,MatSolverFunction f)
{ return MatSolverTypeRegister(stype,mtype,ftype,f); }
PETSC_DEPRECATED_FUNCTION("Use MatSolverTypeGet() (since version 3.9)") static inline PetscErrorCode MatSolverPackageGet(MatSolverType stype,MatType mtype,MatFactorType ftype,PetscBool *foundmtype,PetscBool *foundstype,MatSolverFunction *f)
{ return MatSolverTypeGet(stype,mtype,ftype,foundmtype,foundstype,f); }

/*E
    MatProductType - indicates what type of matrix product is requested

    Level: beginner

.seealso: `MatProductSetType()`
E*/
typedef enum {MATPRODUCT_UNSPECIFIED=0,MATPRODUCT_AB,MATPRODUCT_AtB,MATPRODUCT_ABt,MATPRODUCT_PtAP,MATPRODUCT_RARt,MATPRODUCT_ABC} MatProductType;
PETSC_EXTERN const char *const MatProductTypes[];

/*J
    MatProductAlgorithm - String with the name of an algorithm for a PETSc matrix product implementation

   Level: beginner

.seealso: `MatSetType()`, `Mat`, `MatProductSetAlgorithm()`, `MatProductType`
J*/
typedef const char* MatProductAlgorithm;
#define MATPRODUCTALGORITHMDEFAULT "default"
#define MATPRODUCTALGORITHMSORTED "sorted"
#define MATPRODUCTALGORITHMSCALABLE "scalable"
#define MATPRODUCTALGORITHMSCALABLEFAST "scalable_fast"
#define MATPRODUCTALGORITHMHEAP "heap"
#define MATPRODUCTALGORITHMBHEAP "btheap"
#define MATPRODUCTALGORITHMLLCONDENSED "llcondensed"
#define MATPRODUCTALGORITHMROWMERGE "rowmerge"
#define MATPRODUCTALGORITHMOUTERPRODUCT "outerproduct"
#define MATPRODUCTALGORITHMATB "at*b"
#define MATPRODUCTALGORITHMRAP "rap"
#define MATPRODUCTALGORITHMNONSCALABLE "nonscalable"
#define MATPRODUCTALGORITHMSEQMPI "seqmpi"
#define MATPRODUCTALGORITHMBACKEND "backend"
#define MATPRODUCTALGORITHMOVERLAPPING "overlapping"
#define MATPRODUCTALGORITHMMERGED "merged"
#define MATPRODUCTALGORITHMALLATONCE "allatonce"
#define MATPRODUCTALGORITHMALLATONCEMERGED "allatonce_merged"
#define MATPRODUCTALGORITHMALLGATHERV "allgatherv"
#define MATPRODUCTALGORITHMCYCLIC "cyclic"
#if defined(PETSC_HAVE_HYPRE)
#define MATPRODUCTALGORITHMHYPRE "hypre"
#endif

PETSC_EXTERN PetscErrorCode MatProductCreate(Mat,Mat,Mat,Mat*);
PETSC_EXTERN PetscErrorCode MatProductCreateWithMat(Mat,Mat,Mat,Mat);
PETSC_EXTERN PetscErrorCode MatProductSetType(Mat,MatProductType);
PETSC_EXTERN PetscErrorCode MatProductSetAlgorithm(Mat,MatProductAlgorithm);
PETSC_EXTERN PetscErrorCode MatProductSetFill(Mat,PetscReal);
PETSC_EXTERN PetscErrorCode MatProductSetFromOptions(Mat);
PETSC_EXTERN PetscErrorCode MatProductSymbolic(Mat);
PETSC_EXTERN PetscErrorCode MatProductNumeric(Mat);
PETSC_EXTERN PetscErrorCode MatProductReplaceMats(Mat,Mat,Mat,Mat);
PETSC_EXTERN PetscErrorCode MatProductClear(Mat);
PETSC_EXTERN PetscErrorCode MatProductView(Mat,PetscViewer);
PETSC_EXTERN PetscErrorCode MatProductGetType(Mat,MatProductType*);
PETSC_EXTERN PetscErrorCode MatProductGetMats(Mat,Mat*,Mat*,Mat*);

/* Logging support */
#define    MAT_FILE_CLASSID 1211216    /* used to indicate matrices in binary files */
PETSC_EXTERN PetscClassId MAT_CLASSID;
PETSC_EXTERN PetscClassId MAT_COLORING_CLASSID;
PETSC_EXTERN PetscClassId MAT_FDCOLORING_CLASSID;
PETSC_EXTERN PetscClassId MAT_TRANSPOSECOLORING_CLASSID;
PETSC_EXTERN PetscClassId MAT_PARTITIONING_CLASSID;
PETSC_EXTERN PetscClassId MAT_COARSEN_CLASSID;
PETSC_EXTERN PetscClassId MAT_NULLSPACE_CLASSID;
PETSC_EXTERN PetscClassId MATMFFD_CLASSID;

/*E
    MatReuse - Indicates if matrices obtained from a previous call to MatCreateSubMatrices(), MatCreateSubMatrix(), MatConvert() or several other functions
     are to be reused to store the new matrix values.

$  MAT_INITIAL_MATRIX - create a new matrix
$  MAT_REUSE_MATRIX - reuse the matrix created with a previous call that used MAT_INITIAL_MATRIX
$  MAT_INPLACE_MATRIX - replace the first input matrix with the new matrix (not applicable to all functions)
$  MAT_IGNORE_MATRIX - do not create a new matrix or reuse a give matrix, just ignore that matrix argument (not applicable to all functions)

    Level: beginner

   Any additions/changes here MUST also be made in include/petsc/finclude/petscmat.h

.seealso: `MatCreateSubMatrices()`, `MatCreateSubMatrix()`, `MatDestroyMatrices()`, `MatConvert()`
E*/
typedef enum {MAT_INITIAL_MATRIX,MAT_REUSE_MATRIX,MAT_IGNORE_MATRIX,MAT_INPLACE_MATRIX} MatReuse;

/*E
    MatCreateSubMatrixOption - Indicates if matrices obtained from a call to MatCreateSubMatrices()
     include the matrix values. Currently it is only used by MatGetSeqNonzeroStructure().

    Level: beginner

.seealso: `MatGetSeqNonzeroStructure()`
E*/
typedef enum {MAT_DO_NOT_GET_VALUES,MAT_GET_VALUES} MatCreateSubMatrixOption;

PETSC_EXTERN PetscErrorCode MatInitializePackage(void);

PETSC_EXTERN PetscErrorCode MatCreate(MPI_Comm,Mat*);
PETSC_EXTERN PetscErrorCode MatSetSizes(Mat,PetscInt,PetscInt,PetscInt,PetscInt);
PETSC_EXTERN PetscErrorCode MatSetType(Mat,MatType);
PETSC_EXTERN PetscErrorCode MatGetVecType(Mat,VecType*);
PETSC_EXTERN PetscErrorCode MatSetVecType(Mat,VecType);
PETSC_EXTERN PetscErrorCode MatSetFromOptions(Mat);
PETSC_EXTERN PetscErrorCode MatViewFromOptions(Mat,PetscObject,const char[]);
PETSC_EXTERN PetscErrorCode MatRegister(const char[],PetscErrorCode(*)(Mat));
PETSC_EXTERN PetscErrorCode MatRegisterRootName(const char[],const char[],const char[]);
PETSC_EXTERN PetscErrorCode MatSetOptionsPrefix(Mat,const char[]);
PETSC_EXTERN PetscErrorCode MatSetOptionsPrefixFactor(Mat,const char[]);
PETSC_EXTERN PetscErrorCode MatAppendOptionsPrefixFactor(Mat,const char[]);
PETSC_EXTERN PetscErrorCode MatAppendOptionsPrefix(Mat,const char[]);
PETSC_EXTERN PetscErrorCode MatGetOptionsPrefix(Mat,const char*[]);
PETSC_EXTERN PetscErrorCode MatSetErrorIfFailure(Mat,PetscBool);

PETSC_EXTERN PetscFunctionList MatList;
PETSC_EXTERN PetscFunctionList MatColoringList;
PETSC_EXTERN PetscFunctionList MatPartitioningList;

/*E
    MatStructure - Indicates if two matrices have the same nonzero structure

    Level: beginner

$  SAME_NONZERO_PATTERN  - the two matrices have identical nonzero patterns
$  DIFFERENT_NONZERO_PATTERN - the two matrices may have different nonzero patterns
$  SUBSET_NONZERO_PATTERN - the nonzero pattern of the second matrix is a subset of the nonzero pattern of the first matrix
$  UNKNOWN_NONZERO_PATTERN - there is no known relationship between the nonzero patterns. In this case the implementations may try to detect a relationship to optimize the operation

   Developer Notes:
     Any additions/changes here MUST also be made in src/mat/f90-mod/petscmat.h

.seealso: `MatCopy()`, `MatAXPY()`, `MatAYPX()`
E*/
typedef enum {DIFFERENT_NONZERO_PATTERN,SUBSET_NONZERO_PATTERN,SAME_NONZERO_PATTERN,UNKNOWN_NONZERO_PATTERN} MatStructure;
PETSC_EXTERN const char *const MatStructures[];

#if defined PETSC_HAVE_MKL_SPARSE
PETSC_EXTERN PetscErrorCode MatCreateSeqAIJMKL(MPI_Comm,PetscInt,PetscInt,PetscInt,const PetscInt[],Mat*);
PETSC_EXTERN PetscErrorCode MatCreateMPIAIJMKL(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,const PetscInt[],PetscInt,const PetscInt[],Mat*);
PETSC_EXTERN PetscErrorCode MatCreateBAIJMKL(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,const PetscInt[],PetscInt,const PetscInt[],Mat*);
PETSC_EXTERN PetscErrorCode MatCreateSeqBAIJMKL(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,const PetscInt[],Mat*);
#endif

PETSC_EXTERN PetscErrorCode MatCreateSeqSELL(MPI_Comm,PetscInt,PetscInt,PetscInt,const PetscInt[],Mat*);
PETSC_EXTERN PetscErrorCode MatCreateSELL(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,const PetscInt[],PetscInt,const PetscInt[],Mat*);
PETSC_EXTERN PetscErrorCode MatSeqSELLSetPreallocation(Mat,PetscInt,const PetscInt[]);
PETSC_EXTERN PetscErrorCode MatMPISELLSetPreallocation(Mat,PetscInt,const PetscInt[],PetscInt,const PetscInt[]);

PETSC_EXTERN PetscErrorCode MatCreateSeqDense(MPI_Comm,PetscInt,PetscInt,PetscScalar[],Mat*);
PETSC_EXTERN PetscErrorCode MatCreateDense(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,PetscScalar[],Mat*);
PETSC_EXTERN PetscErrorCode MatCreateSeqAIJ(MPI_Comm,PetscInt,PetscInt,PetscInt,const PetscInt[],Mat*);
PETSC_EXTERN PetscErrorCode MatCreateAIJ(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,const PetscInt[],PetscInt,const PetscInt[],Mat*);
PETSC_EXTERN PetscErrorCode MatCreateMPIAIJWithArrays(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,const PetscInt[],const PetscInt[],const PetscScalar[],Mat*);
PETSC_EXTERN PetscErrorCode MatUpdateMPIAIJWithArrays(Mat,PetscInt,PetscInt,PetscInt,PetscInt,const PetscInt[],const PetscInt[],const PetscScalar[]);
PETSC_EXTERN PetscErrorCode MatUpdateMPIAIJWithArray(Mat,const PetscScalar []);
PETSC_EXTERN PetscErrorCode MatCreateMPIAIJWithSplitArrays(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt[],PetscInt[],PetscScalar[],PetscInt[],PetscInt[],PetscScalar[],Mat*);
PETSC_EXTERN PetscErrorCode MatCreateMPIAIJWithSeqAIJ(MPI_Comm,Mat,Mat,const PetscInt[],Mat*);

PETSC_EXTERN PetscErrorCode MatCreateSeqBAIJ(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,const PetscInt[],Mat*);
PETSC_EXTERN PetscErrorCode MatCreateBAIJ(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,const PetscInt[],PetscInt,const PetscInt[],Mat*);
PETSC_EXTERN PetscErrorCode MatCreateMPIBAIJWithArrays(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,const PetscInt[],const PetscInt[],const PetscScalar[],Mat*);

PETSC_EXTERN PetscErrorCode MatSetPreallocationCOO(Mat,PetscCount,const PetscInt[],const PetscInt[]);
PETSC_EXTERN PetscErrorCode MatSetPreallocationCOOLocal(Mat,PetscCount,PetscInt[],PetscInt[]);
PETSC_EXTERN PetscErrorCode MatSetValuesCOO(Mat,const PetscScalar[],InsertMode);

PETSC_EXTERN PetscErrorCode MatCreateMPIAdj(MPI_Comm,PetscInt,PetscInt,PetscInt[],PetscInt[],PetscInt[],Mat*);
PETSC_EXTERN PetscErrorCode MatCreateSeqSBAIJ(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,const PetscInt[],Mat*);

PETSC_EXTERN PetscErrorCode MatCreateSBAIJ(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,const PetscInt[],PetscInt,const PetscInt[],Mat*);
PETSC_EXTERN PetscErrorCode MatCreateMPISBAIJWithArrays(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,const PetscInt[],const PetscInt[],const PetscScalar[],Mat *);
PETSC_EXTERN PetscErrorCode MatSeqSBAIJSetPreallocationCSR(Mat,PetscInt,const PetscInt[],const PetscInt[],const PetscScalar[]);
PETSC_EXTERN PetscErrorCode MatMPISBAIJSetPreallocationCSR(Mat,PetscInt,const PetscInt[],const PetscInt[],const PetscScalar[]);
PETSC_EXTERN PetscErrorCode MatXAIJSetPreallocation(Mat,PetscInt,const PetscInt[],const PetscInt[],const PetscInt[],const PetscInt[]);

PETSC_EXTERN PetscErrorCode MatCreateShell(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,void *,Mat*);
PETSC_EXTERN PetscErrorCode MatCreateCentering(MPI_Comm,PetscInt,PetscInt,Mat*);
PETSC_EXTERN PetscErrorCode MatCreateNormal(Mat,Mat*);
PETSC_EXTERN PetscErrorCode MatCreateNormalHermitian(Mat,Mat*);
PETSC_EXTERN PetscErrorCode MatCreateLRC(Mat,Mat,Vec,Mat,Mat*);
PETSC_EXTERN PetscErrorCode MatLRCGetMats(Mat,Mat*,Mat*,Vec*,Mat*);
PETSC_EXTERN PetscErrorCode MatCreateIS(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,ISLocalToGlobalMapping,ISLocalToGlobalMapping,Mat*);
PETSC_EXTERN PetscErrorCode MatCreateSeqAIJCRL(MPI_Comm,PetscInt,PetscInt,PetscInt,const PetscInt[],Mat*);
PETSC_EXTERN PetscErrorCode MatCreateMPIAIJCRL(MPI_Comm,PetscInt,PetscInt,PetscInt,const PetscInt[],PetscInt,const PetscInt[],Mat*);

PETSC_EXTERN PetscErrorCode MatCreateScatter(MPI_Comm,VecScatter,Mat*);
PETSC_EXTERN PetscErrorCode MatScatterSetVecScatter(Mat,VecScatter);
PETSC_EXTERN PetscErrorCode MatScatterGetVecScatter(Mat,VecScatter*);
PETSC_EXTERN PetscErrorCode MatCreateBlockMat(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt*,Mat*);
PETSC_EXTERN PetscErrorCode MatCompositeAddMat(Mat,Mat);
PETSC_EXTERN PetscErrorCode MatCompositeMerge(Mat);
typedef enum {MAT_COMPOSITE_MERGE_RIGHT,MAT_COMPOSITE_MERGE_LEFT} MatCompositeMergeType;
PETSC_EXTERN PetscErrorCode MatCompositeSetMergeType(Mat,MatCompositeMergeType);
PETSC_EXTERN PetscErrorCode MatCreateComposite(MPI_Comm,PetscInt,const Mat*,Mat*);
typedef enum {MAT_COMPOSITE_ADDITIVE,MAT_COMPOSITE_MULTIPLICATIVE} MatCompositeType;
PETSC_EXTERN PetscErrorCode MatCompositeSetType(Mat,MatCompositeType);
PETSC_EXTERN PetscErrorCode MatCompositeGetType(Mat,MatCompositeType*);
PETSC_EXTERN PetscErrorCode MatCompositeSetMatStructure(Mat,MatStructure);
PETSC_EXTERN PetscErrorCode MatCompositeGetMatStructure(Mat,MatStructure*);
PETSC_EXTERN PetscErrorCode MatCompositeGetNumberMat(Mat,PetscInt*);
PETSC_EXTERN PetscErrorCode MatCompositeGetMat(Mat,PetscInt,Mat*);
PETSC_EXTERN PetscErrorCode MatCompositeSetScalings(Mat,const PetscScalar*);

PETSC_EXTERN PetscErrorCode MatCreateFFT(MPI_Comm,PetscInt,const PetscInt[],MatType,Mat*);
PETSC_EXTERN PetscErrorCode MatCreateSeqCUFFT(MPI_Comm,PetscInt,const PetscInt[],Mat*);

PETSC_EXTERN PetscErrorCode MatCreateTranspose(Mat,Mat*);
PETSC_EXTERN PetscErrorCode MatTransposeGetMat(Mat,Mat*);
PETSC_EXTERN PetscErrorCode MatCreateHermitianTranspose(Mat,Mat*);
PETSC_EXTERN PetscErrorCode MatHermitianTransposeGetMat(Mat,Mat*);
PETSC_EXTERN PetscErrorCode MatNormalGetMat(Mat,Mat*);
PETSC_EXTERN PetscErrorCode MatNormalHermitianGetMat(Mat,Mat*);
PETSC_EXTERN PetscErrorCode MatCreateSubMatrixVirtual(Mat,IS,IS,Mat*);
PETSC_EXTERN PetscErrorCode MatSubMatrixVirtualUpdate(Mat,Mat,IS,IS);
PETSC_EXTERN PetscErrorCode MatCreateLocalRef(Mat,IS,IS,Mat*);
PETSC_EXTERN PetscErrorCode MatCreateConstantDiagonal(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,PetscScalar,Mat*);

#if defined(PETSC_HAVE_HYPRE)
PETSC_EXTERN PetscErrorCode MatHYPRESetPreallocation(Mat,PetscInt,const PetscInt[],PetscInt,const PetscInt[]);
#endif

PETSC_EXTERN PetscErrorCode MatPythonSetType(Mat,const char[]);

PETSC_EXTERN PetscErrorCode MatResetPreallocation(Mat);
PETSC_EXTERN PetscErrorCode MatSetUp(Mat);
PETSC_EXTERN PetscErrorCode MatDestroy(Mat*);
PETSC_EXTERN PetscErrorCode MatGetNonzeroState(Mat,PetscObjectState*);

PETSC_EXTERN PetscErrorCode MatConjugate(Mat);
PETSC_EXTERN PetscErrorCode MatRealPart(Mat);
PETSC_EXTERN PetscErrorCode MatImaginaryPart(Mat);
PETSC_EXTERN PetscErrorCode MatGetDiagonalBlock(Mat,Mat*);
PETSC_EXTERN PetscErrorCode MatGetTrace(Mat,PetscScalar*);
PETSC_EXTERN PetscErrorCode MatInvertBlockDiagonal(Mat,const PetscScalar **);
PETSC_EXTERN PetscErrorCode MatInvertVariableBlockDiagonal(Mat,PetscInt,const PetscInt*,PetscScalar*);
PETSC_EXTERN PetscErrorCode MatInvertBlockDiagonalMat(Mat,Mat);
PETSC_EXTERN PetscErrorCode MatInvertVariableBlockEnvelope(Mat,MatReuse,Mat*);

/* ------------------------------------------------------------*/
PETSC_EXTERN PetscErrorCode MatSetValues(Mat,PetscInt,const PetscInt[],PetscInt,const PetscInt[],const PetscScalar[],InsertMode);
PETSC_EXTERN PetscErrorCode MatSetValuesIS(Mat,IS,IS,const PetscScalar[],InsertMode);
PETSC_EXTERN PetscErrorCode MatSetValuesBlocked(Mat,PetscInt,const PetscInt[],PetscInt,const PetscInt[],const PetscScalar[],InsertMode);
PETSC_EXTERN PetscErrorCode MatSetValuesRow(Mat,PetscInt,const PetscScalar[]);
PETSC_EXTERN PetscErrorCode MatSetValuesRowLocal(Mat,PetscInt,const PetscScalar[]);
PETSC_EXTERN PetscErrorCode MatSetValuesBatch(Mat,PetscInt,PetscInt,PetscInt[],const PetscScalar[]);
PETSC_EXTERN PetscErrorCode MatSetRandom(Mat,PetscRandom);

/*S
     MatStencil - Data structure (C struct) for storing information about a single row or
        column of a matrix as indexed on an associated grid. These are arguments to MatSetStencil() and MatSetBlockStencil()

   The i,j, and k represent the logical coordinates over the entire grid (for 2 and 1 dimensional problems the k and j entries are ignored).
   The c represents the the degrees of freedom at each grid point (the dof argument to DMDASetDOF()). If dof is 1 then this entry is ignored.

   For stencil access to vectors see DMDAVecGetArray(), DMDAVecGetArrayF90().

   Fortran usage is different, see MatSetValuesStencil() for details.

   Level: beginner

.seealso: `MatSetValuesStencil()`, `MatSetStencil()`, `MatSetValuesBlockedStencil()`, `DMDAVecGetArray()`, `DMDAVecGetArrayF90()`
S*/
typedef struct {
  PetscInt k,j,i,c;
} MatStencil;

PETSC_EXTERN PetscErrorCode MatSetValuesStencil(Mat,PetscInt,const MatStencil[],PetscInt,const MatStencil[],const PetscScalar[],InsertMode);
PETSC_EXTERN PetscErrorCode MatSetValuesBlockedStencil(Mat,PetscInt,const MatStencil[],PetscInt,const MatStencil[],const PetscScalar[],InsertMode);
PETSC_EXTERN PetscErrorCode MatSetStencil(Mat,PetscInt,const PetscInt[],const PetscInt[],PetscInt);

/*E
    MatAssemblyType - Indicates if the matrix is now to be used, or if you plan
     to continue to add or insert values to it

    Level: beginner

.seealso: `MatAssemblyBegin()`, `MatAssemblyEnd()`
E*/
typedef enum {MAT_FLUSH_ASSEMBLY=1,MAT_FINAL_ASSEMBLY=0} MatAssemblyType;
PETSC_EXTERN PetscErrorCode MatAssemblyBegin(Mat,MatAssemblyType);
PETSC_EXTERN PetscErrorCode MatAssemblyEnd(Mat,MatAssemblyType);
PETSC_EXTERN PetscErrorCode MatAssembled(Mat,PetscBool *);

/*E
    MatOption - Options that may be set for a matrix and its behavior or storage

    Level: beginner

   Any additions/changes here MUST also be made in include/petsc/finclude/petscmat.h
   Any additions/changes here must also be made in src/mat/interface/dlregismat.c in MatOptions[]

   Developer Notes:
    Entries that are negative need not be called collectively by all processes.

.seealso: `MatSetOption()`
E*/
typedef enum {MAT_OPTION_MIN = -3,
              MAT_UNUSED_NONZERO_LOCATION_ERR = -2,
              MAT_ROW_ORIENTED = -1,
              MAT_SYMMETRIC = 1,
              MAT_STRUCTURALLY_SYMMETRIC = 2,
              MAT_FORCE_DIAGONAL_ENTRIES = 3,
              MAT_IGNORE_OFF_PROC_ENTRIES = 4,
              MAT_USE_HASH_TABLE = 5,
              MAT_KEEP_NONZERO_PATTERN = 6,
              MAT_IGNORE_ZERO_ENTRIES = 7,
              MAT_USE_INODES = 8,
              MAT_HERMITIAN = 9,
              MAT_SYMMETRY_ETERNAL = 10,
              MAT_NEW_NONZERO_LOCATION_ERR = 11,
              MAT_IGNORE_LOWER_TRIANGULAR = 12,
              MAT_ERROR_LOWER_TRIANGULAR = 13,
              MAT_GETROW_UPPERTRIANGULAR = 14,
              MAT_SPD = 15,
              MAT_NO_OFF_PROC_ZERO_ROWS = 16,
              MAT_NO_OFF_PROC_ENTRIES = 17,
              MAT_NEW_NONZERO_LOCATIONS = 18,
              MAT_NEW_NONZERO_ALLOCATION_ERR = 19,
              MAT_SUBSET_OFF_PROC_ENTRIES = 20,
              MAT_SUBMAT_SINGLEIS = 21,
              MAT_STRUCTURE_ONLY = 22,
              MAT_SORTED_FULL = 23,
              MAT_FORM_EXPLICIT_TRANSPOSE = 24,
              MAT_OPTION_MAX = 25} MatOption;

PETSC_EXTERN const char *const *MatOptions;
PETSC_EXTERN PetscErrorCode MatSetOption(Mat,MatOption,PetscBool);
PETSC_EXTERN PetscErrorCode MatGetOption(Mat,MatOption,PetscBool*);
PETSC_EXTERN PetscErrorCode MatPropagateSymmetryOptions(Mat,Mat);
PETSC_EXTERN PetscErrorCode MatGetType(Mat,MatType*);

PETSC_EXTERN PetscErrorCode MatGetValues(Mat,PetscInt,const PetscInt[],PetscInt,const PetscInt[],PetscScalar[]);
PETSC_EXTERN PetscErrorCode MatGetRow(Mat,PetscInt,PetscInt *,const PetscInt *[],const PetscScalar*[]);
PETSC_EXTERN PetscErrorCode MatRestoreRow(Mat,PetscInt,PetscInt *,const PetscInt *[],const PetscScalar*[]);
PETSC_EXTERN PetscErrorCode MatGetRowUpperTriangular(Mat);
PETSC_EXTERN PetscErrorCode MatRestoreRowUpperTriangular(Mat);
PETSC_EXTERN PetscErrorCode MatGetColumnVector(Mat,Vec,PetscInt);
PETSC_EXTERN PetscErrorCode MatSeqAIJGetArray(Mat,PetscScalar *[]);
PETSC_EXTERN PetscErrorCode MatSeqAIJGetArrayRead(Mat,const PetscScalar *[]);
PETSC_EXTERN PetscErrorCode MatSeqAIJGetArrayWrite(Mat,PetscScalar *[]);
PETSC_EXTERN PetscErrorCode MatSeqAIJRestoreArray(Mat,PetscScalar *[]);
PETSC_EXTERN PetscErrorCode MatSeqAIJRestoreArrayRead(Mat,const PetscScalar *[]);
PETSC_EXTERN PetscErrorCode MatSeqAIJRestoreArrayWrite(Mat,PetscScalar *[]);
PETSC_EXTERN PetscErrorCode MatSeqAIJGetMaxRowNonzeros(Mat,PetscInt*);
PETSC_EXTERN PetscErrorCode MatSeqAIJSetValuesLocalFast(Mat,PetscInt,const PetscInt[],PetscInt,const PetscInt[],const PetscScalar[],InsertMode);
PETSC_EXTERN PetscErrorCode MatSeqAIJSetType(Mat,MatType);
PETSC_EXTERN PetscErrorCode MatSeqAIJKron(Mat,Mat,MatReuse,Mat*);
PETSC_EXTERN PetscErrorCode MatSeqAIJRegister(const char[],PetscErrorCode (*)(Mat,MatType,MatReuse,Mat *));
PETSC_EXTERN PetscFunctionList MatSeqAIJList;
PETSC_EXTERN PetscErrorCode MatSeqBAIJGetArray(Mat,PetscScalar *[]);
PETSC_EXTERN PetscErrorCode MatSeqBAIJRestoreArray(Mat,PetscScalar *[]);
PETSC_EXTERN PetscErrorCode MatSeqSBAIJGetArray(Mat,PetscScalar *[]);
PETSC_EXTERN PetscErrorCode MatSeqSBAIJRestoreArray(Mat,PetscScalar *[]);
PETSC_EXTERN PetscErrorCode MatDenseGetArray(Mat,PetscScalar *[]);
PETSC_EXTERN PetscErrorCode MatDenseRestoreArray(Mat,PetscScalar *[]);
PETSC_EXTERN PetscErrorCode MatDensePlaceArray(Mat,const PetscScalar[]);
PETSC_EXTERN PetscErrorCode MatDenseReplaceArray(Mat,const PetscScalar[]);
PETSC_EXTERN PetscErrorCode MatDenseResetArray(Mat);
PETSC_EXTERN PetscErrorCode MatDenseGetArrayRead(Mat,const PetscScalar *[]);
PETSC_EXTERN PetscErrorCode MatDenseRestoreArrayRead(Mat,const PetscScalar *[]);
PETSC_EXTERN PetscErrorCode MatDenseGetArrayWrite(Mat,PetscScalar *[]);
PETSC_EXTERN PetscErrorCode MatDenseRestoreArrayWrite(Mat,PetscScalar *[]);
PETSC_EXTERN PetscErrorCode MatGetBlockSize(Mat,PetscInt *);
PETSC_EXTERN PetscErrorCode MatSetBlockSize(Mat,PetscInt);
PETSC_EXTERN PetscErrorCode MatGetBlockSizes(Mat,PetscInt *,PetscInt *);
PETSC_EXTERN PetscErrorCode MatSetBlockSizes(Mat,PetscInt,PetscInt);
PETSC_EXTERN PetscErrorCode MatSetBlockSizesFromMats(Mat,Mat,Mat);
PETSC_EXTERN PetscErrorCode MatSetVariableBlockSizes(Mat,PetscInt,PetscInt*);
PETSC_EXTERN PetscErrorCode MatGetVariableBlockSizes(Mat,PetscInt*,const PetscInt**);

PETSC_EXTERN PetscErrorCode MatDenseGetColumn(Mat,PetscInt,PetscScalar*[]);
PETSC_EXTERN PetscErrorCode MatDenseRestoreColumn(Mat,PetscScalar*[]);
PETSC_EXTERN PetscErrorCode MatDenseGetColumnVec(Mat,PetscInt,Vec*);
PETSC_EXTERN PetscErrorCode MatDenseRestoreColumnVec(Mat,PetscInt,Vec*);
PETSC_EXTERN PetscErrorCode MatDenseGetColumnVecRead(Mat,PetscInt,Vec*);
PETSC_EXTERN PetscErrorCode MatDenseRestoreColumnVecRead(Mat,PetscInt,Vec*);
PETSC_EXTERN PetscErrorCode MatDenseGetColumnVecWrite(Mat,PetscInt,Vec*);
PETSC_EXTERN PetscErrorCode MatDenseRestoreColumnVecWrite(Mat,PetscInt,Vec*);
PETSC_EXTERN PetscErrorCode MatDenseGetSubMatrix(Mat,PetscInt,PetscInt,PetscInt,PetscInt,Mat*);
PETSC_EXTERN PetscErrorCode MatDenseRestoreSubMatrix(Mat,Mat*);

PETSC_EXTERN PetscErrorCode MatMult(Mat,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatMultDiagonalBlock(Mat,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatMultAdd(Mat,Vec,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatMultTranspose(Mat,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatMultHermitianTranspose(Mat,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatIsTranspose(Mat,Mat,PetscReal,PetscBool *);
PETSC_EXTERN PetscErrorCode MatIsHermitianTranspose(Mat,Mat,PetscReal,PetscBool *);
PETSC_EXTERN PetscErrorCode MatMultTransposeAdd(Mat,Vec,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatMultHermitianTransposeAdd(Mat,Vec,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatMatSolve(Mat,Mat,Mat);
PETSC_EXTERN PetscErrorCode MatMatSolveTranspose(Mat,Mat,Mat);
PETSC_EXTERN PetscErrorCode MatMatTransposeSolve(Mat,Mat,Mat);
PETSC_EXTERN PetscErrorCode MatResidual(Mat,Vec,Vec,Vec);

/*E
    MatDuplicateOption - Indicates if a duplicated sparse matrix should have
  its numerical values copied over or just its nonzero structure.

    Level: beginner

   Any additions/changes here MUST also be made in include/petsc/finclude/petscmat.h

$   MAT_DO_NOT_COPY_VALUES    - Create a matrix using the same nonzero pattern as the original matrix,
$                               with zeros for the numerical values.
$   MAT_COPY_VALUES           - Create a matrix with the same nonzero pattern as the original matrix
$                               and with the same numerical values.
$   MAT_SHARE_NONZERO_PATTERN - Create a matrix that shares the nonzero structure with the previous matrix
$                               and does not copy it, using zeros for the numerical values. The parent and
$                               child matrices will share their index (i and j) arrays, and you cannot
$                               insert new nonzero entries into either matrix.

Notes:
    Many matrix types (including SeqAIJ) do not support the MAT_SHARE_NONZERO_PATTERN optimization; in
this case the behavior is as if MAT_DO_NOT_COPY_VALUES has been specified.

.seealso: `MatDuplicate()`
E*/
typedef enum {MAT_DO_NOT_COPY_VALUES,MAT_COPY_VALUES,MAT_SHARE_NONZERO_PATTERN} MatDuplicateOption;

PETSC_EXTERN PetscErrorCode MatConvert(Mat,MatType,MatReuse,Mat*);
PETSC_EXTERN PetscErrorCode MatDuplicate(Mat,MatDuplicateOption,Mat*);

PETSC_EXTERN PetscErrorCode MatCopy(Mat,Mat,MatStructure);
PETSC_EXTERN PetscErrorCode MatView(Mat,PetscViewer);
PETSC_EXTERN PetscErrorCode MatIsSymmetric(Mat,PetscReal,PetscBool *);
PETSC_EXTERN PetscErrorCode MatIsStructurallySymmetric(Mat,PetscBool *);
PETSC_EXTERN PetscErrorCode MatIsHermitian(Mat,PetscReal,PetscBool *);
PETSC_EXTERN PetscErrorCode MatIsSymmetricKnown(Mat,PetscBool *,PetscBool *);
PETSC_EXTERN PetscErrorCode MatIsHermitianKnown(Mat,PetscBool *,PetscBool *);
PETSC_EXTERN PetscErrorCode MatMissingDiagonal(Mat,PetscBool  *,PetscInt *);
PETSC_EXTERN PetscErrorCode MatLoad(Mat, PetscViewer);

PETSC_EXTERN PetscErrorCode MatGetRowIJ(Mat,PetscInt,PetscBool ,PetscBool ,PetscInt*,const PetscInt *[],const PetscInt *[],PetscBool  *);
PETSC_EXTERN PetscErrorCode MatRestoreRowIJ(Mat,PetscInt,PetscBool ,PetscBool ,PetscInt *,const PetscInt *[],const PetscInt *[],PetscBool  *);
PETSC_EXTERN PetscErrorCode MatGetColumnIJ(Mat,PetscInt,PetscBool ,PetscBool ,PetscInt*,const PetscInt *[],const PetscInt *[],PetscBool  *);
PETSC_EXTERN PetscErrorCode MatRestoreColumnIJ(Mat,PetscInt,PetscBool ,PetscBool ,PetscInt *,const PetscInt *[],const PetscInt *[],PetscBool  *);

/*S
     MatInfo - Context of matrix information, used with MatGetInfo()

   In Fortran this is simply a double precision array of dimension MAT_INFO_SIZE

   Level: intermediate

.seealso: `MatGetInfo()`, `MatInfoType`
S*/
typedef struct {
  PetscLogDouble block_size;                         /* block size */
  PetscLogDouble nz_allocated,nz_used,nz_unneeded;   /* number of nonzeros */
  PetscLogDouble memory;                             /* memory allocated */
  PetscLogDouble assemblies;                         /* number of matrix assemblies called */
  PetscLogDouble mallocs;                            /* number of mallocs during MatSetValues() */
  PetscLogDouble fill_ratio_given,fill_ratio_needed; /* fill ratio for LU/ILU */
  PetscLogDouble factor_mallocs;                     /* number of mallocs during factorization */
} MatInfo;

/*E
    MatInfoType - Indicates if you want information about the local part of the matrix,
     the entire parallel matrix or the maximum over all the local parts.

    Level: beginner

   Any additions/changes here MUST also be made in include/petsc/finclude/petscmat.h

.seealso: `MatGetInfo()`, `MatInfo`
E*/
typedef enum {MAT_LOCAL=1,MAT_GLOBAL_MAX=2,MAT_GLOBAL_SUM=3} MatInfoType;
PETSC_EXTERN PetscErrorCode MatGetInfo(Mat,MatInfoType,MatInfo*);
PETSC_EXTERN PetscErrorCode MatGetDiagonal(Mat,Vec);
PETSC_EXTERN PetscErrorCode MatGetRowMax(Mat,Vec,PetscInt[]);
PETSC_EXTERN PetscErrorCode MatGetRowMin(Mat,Vec,PetscInt[]);
PETSC_EXTERN PetscErrorCode MatGetRowMaxAbs(Mat,Vec,PetscInt[]);
PETSC_EXTERN PetscErrorCode MatGetRowMinAbs(Mat,Vec,PetscInt[]);
PETSC_EXTERN PetscErrorCode MatGetRowSum(Mat,Vec);
PETSC_EXTERN PetscErrorCode MatTranspose(Mat,MatReuse,Mat*);
PETSC_EXTERN PetscErrorCode MatHermitianTranspose(Mat,MatReuse,Mat*);
PETSC_EXTERN PetscErrorCode MatPermute(Mat,IS,IS,Mat*);
PETSC_EXTERN PetscErrorCode MatDiagonalScale(Mat,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatDiagonalSet(Mat,Vec,InsertMode);

PETSC_EXTERN PetscErrorCode MatEqual(Mat,Mat,PetscBool*);
PETSC_EXTERN PetscErrorCode MatMultEqual(Mat,Mat,PetscInt,PetscBool*);
PETSC_EXTERN PetscErrorCode MatMultAddEqual(Mat,Mat,PetscInt,PetscBool*);
PETSC_EXTERN PetscErrorCode MatMultTransposeEqual(Mat,Mat,PetscInt,PetscBool*);
PETSC_EXTERN PetscErrorCode MatMultTransposeAddEqual(Mat,Mat,PetscInt,PetscBool*);
PETSC_EXTERN PetscErrorCode MatMultHermitianTransposeEqual(Mat,Mat,PetscInt,PetscBool*);
PETSC_EXTERN PetscErrorCode MatMultHermitianTransposeAddEqual(Mat,Mat,PetscInt,PetscBool*);
PETSC_EXTERN PetscErrorCode MatMatMultEqual(Mat,Mat,Mat,PetscInt,PetscBool*);
PETSC_EXTERN PetscErrorCode MatTransposeMatMultEqual(Mat,Mat,Mat,PetscInt,PetscBool*);
PETSC_EXTERN PetscErrorCode MatMatTransposeMultEqual(Mat,Mat,Mat,PetscInt,PetscBool*);
PETSC_EXTERN PetscErrorCode MatPtAPMultEqual(Mat,Mat,Mat,PetscInt,PetscBool*);
PETSC_EXTERN PetscErrorCode MatRARtMultEqual(Mat,Mat,Mat,PetscInt,PetscBool*);
PETSC_EXTERN PetscErrorCode MatIsLinear(Mat,PetscInt,PetscBool*);

PETSC_EXTERN PetscErrorCode MatNorm(Mat,NormType,PetscReal*);
PETSC_EXTERN PetscErrorCode MatGetColumnNorms(Mat,NormType,PetscReal*);
PETSC_EXTERN PetscErrorCode MatGetColumnSums(Mat,PetscScalar*);
PETSC_EXTERN PetscErrorCode MatGetColumnSumsRealPart(Mat,PetscReal*);
PETSC_EXTERN PetscErrorCode MatGetColumnSumsImaginaryPart(Mat,PetscReal*);
PETSC_EXTERN PetscErrorCode MatGetColumnMeans(Mat,PetscScalar*);
PETSC_EXTERN PetscErrorCode MatGetColumnMeansRealPart(Mat,PetscReal*);
PETSC_EXTERN PetscErrorCode MatGetColumnMeansImaginaryPart(Mat,PetscReal*);
PETSC_EXTERN PetscErrorCode MatGetColumnReductions(Mat,PetscInt,PetscReal*);
PETSC_EXTERN PetscErrorCode MatZeroEntries(Mat);
PETSC_EXTERN PetscErrorCode MatSetInf(Mat);
PETSC_EXTERN PetscErrorCode MatZeroRows(Mat,PetscInt,const PetscInt [],PetscScalar,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatZeroRowsIS(Mat,IS,PetscScalar,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatZeroRowsStencil(Mat,PetscInt,const MatStencil [],PetscScalar,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatZeroRowsColumnsStencil(Mat,PetscInt,const MatStencil[],PetscScalar,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatZeroRowsColumns(Mat,PetscInt,const PetscInt [],PetscScalar,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatZeroRowsColumnsIS(Mat,IS,PetscScalar,Vec,Vec);

PETSC_EXTERN PetscErrorCode MatGetSize(Mat,PetscInt*,PetscInt*);
PETSC_EXTERN PetscErrorCode MatGetLocalSize(Mat,PetscInt*,PetscInt*);
PETSC_EXTERN PetscErrorCode MatGetOwnershipRange(Mat,PetscInt*,PetscInt*);
PETSC_EXTERN PetscErrorCode MatGetOwnershipRanges(Mat,const PetscInt**);
PETSC_EXTERN PetscErrorCode MatGetOwnershipRangeColumn(Mat,PetscInt*,PetscInt*);
PETSC_EXTERN PetscErrorCode MatGetOwnershipRangesColumn(Mat,const PetscInt**);
PETSC_EXTERN PetscErrorCode MatGetOwnershipIS(Mat,IS*,IS*);

PETSC_EXTERN PetscErrorCode MatCreateSubMatrices(Mat,PetscInt,const IS[],const IS[],MatReuse,Mat *[]);
PETSC_DEPRECATED_FUNCTION("Use MatCreateSubMatrices() (since version 3.8)") static inline PetscErrorCode MatGetSubMatrices(Mat mat,PetscInt n,const IS irow[],const IS icol[],MatReuse scall,Mat *submat[]) {return MatCreateSubMatrices(mat,n,irow,icol,scall,submat);}
PETSC_EXTERN PetscErrorCode MatCreateSubMatricesMPI(Mat,PetscInt,const IS[],const IS[],MatReuse,Mat *[]);
PETSC_DEPRECATED_FUNCTION("Use MatCreateSubMatricesMPI() (since version 3.8)") static inline PetscErrorCode MatGetSubMatricesMPI(Mat mat,PetscInt n,const IS irow[],const IS icol[],MatReuse scall,Mat *submat[]) {return MatCreateSubMatricesMPI(mat,n,irow,icol,scall,submat);}
PETSC_EXTERN PetscErrorCode MatDestroyMatrices(PetscInt,Mat *[]);
PETSC_EXTERN PetscErrorCode MatDestroySubMatrices(PetscInt,Mat *[]);
PETSC_EXTERN PetscErrorCode MatCreateSubMatrix(Mat,IS,IS,MatReuse,Mat *);
PETSC_DEPRECATED_FUNCTION("Use MatCreateSubMatrix() (since version 3.8)") static inline PetscErrorCode MatGetSubMatrix(Mat mat,IS isrow,IS iscol,MatReuse cll,Mat *newmat) {return MatCreateSubMatrix(mat,isrow,iscol,cll,newmat);}
PETSC_EXTERN PetscErrorCode MatGetLocalSubMatrix(Mat,IS,IS,Mat*);
PETSC_EXTERN PetscErrorCode MatRestoreLocalSubMatrix(Mat,IS,IS,Mat*);
PETSC_EXTERN PetscErrorCode MatGetSeqNonzeroStructure(Mat,Mat*);
PETSC_EXTERN PetscErrorCode MatDestroySeqNonzeroStructure(Mat*);

PETSC_EXTERN PetscErrorCode MatCreateMPIAIJSumSeqAIJ(MPI_Comm,Mat,PetscInt,PetscInt,MatReuse,Mat*);
PETSC_EXTERN PetscErrorCode MatCreateMPIAIJSumSeqAIJSymbolic(MPI_Comm,Mat,PetscInt,PetscInt,Mat*);
PETSC_EXTERN PetscErrorCode MatCreateMPIAIJSumSeqAIJNumeric(Mat,Mat);
PETSC_EXTERN PetscErrorCode MatMPIAIJGetLocalMat(Mat,MatReuse,Mat*);
PETSC_EXTERN PetscErrorCode MatAIJGetLocalMat(Mat,Mat*);
PETSC_EXTERN PetscErrorCode MatMPIAIJGetLocalMatCondensed(Mat,MatReuse,IS*,IS*,Mat*);
PETSC_EXTERN PetscErrorCode MatMPIAIJGetLocalMatMerge(Mat,MatReuse,IS*,Mat*);
PETSC_EXTERN PetscErrorCode MatMPIAIJGetNumberNonzeros(Mat,PetscCount*);
PETSC_EXTERN PetscErrorCode MatGetBrowsOfAcols(Mat,Mat,MatReuse,IS*,IS*,Mat*);
PETSC_EXTERN PetscErrorCode MatGetGhosts(Mat, PetscInt *,const PetscInt *[]);

PETSC_EXTERN PetscErrorCode MatIncreaseOverlap(Mat,PetscInt,IS[],PetscInt);
PETSC_EXTERN PetscErrorCode MatIncreaseOverlapSplit(Mat mat,PetscInt n,IS is[],PetscInt ov);
PETSC_EXTERN PetscErrorCode MatMPIAIJSetUseScalableIncreaseOverlap(Mat,PetscBool);

PETSC_EXTERN PetscErrorCode MatMatMult(Mat,Mat,MatReuse,PetscReal,Mat*);

PETSC_EXTERN PetscErrorCode MatMatMatMult(Mat,Mat,Mat,MatReuse,PetscReal,Mat*);
PETSC_EXTERN PetscErrorCode MatGalerkin(Mat,Mat,Mat,MatReuse,PetscReal,Mat*);

PETSC_EXTERN PetscErrorCode MatPtAP(Mat,Mat,MatReuse,PetscReal,Mat*);
PETSC_EXTERN PetscErrorCode MatRARt(Mat,Mat,MatReuse,PetscReal,Mat*);

PETSC_EXTERN PetscErrorCode MatTransposeMatMult(Mat,Mat,MatReuse,PetscReal,Mat*);
PETSC_EXTERN PetscErrorCode MatMatTransposeMult(Mat,Mat,MatReuse,PetscReal,Mat*);

PETSC_EXTERN PetscErrorCode MatAXPY(Mat,PetscScalar,Mat,MatStructure);
PETSC_EXTERN PetscErrorCode MatAYPX(Mat,PetscScalar,Mat,MatStructure);

PETSC_EXTERN PetscErrorCode MatScale(Mat,PetscScalar);
PETSC_EXTERN PetscErrorCode MatShift(Mat,PetscScalar);

PETSC_EXTERN PetscErrorCode MatSetLocalToGlobalMapping(Mat,ISLocalToGlobalMapping,ISLocalToGlobalMapping);
PETSC_EXTERN PetscErrorCode MatGetLocalToGlobalMapping(Mat,ISLocalToGlobalMapping*,ISLocalToGlobalMapping*);
PETSC_EXTERN PetscErrorCode MatGetLayouts(Mat,PetscLayout*,PetscLayout*);
PETSC_EXTERN PetscErrorCode MatSetLayouts(Mat,PetscLayout,PetscLayout);
PETSC_EXTERN PetscErrorCode MatZeroRowsLocal(Mat,PetscInt,const PetscInt [],PetscScalar,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatZeroRowsLocalIS(Mat,IS,PetscScalar,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatZeroRowsColumnsLocal(Mat,PetscInt,const PetscInt [],PetscScalar,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatZeroRowsColumnsLocalIS(Mat,IS,PetscScalar,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatGetValuesLocal(Mat,PetscInt,const PetscInt[],PetscInt,const PetscInt[],PetscScalar[]);
PETSC_EXTERN PetscErrorCode MatSetValuesLocal(Mat,PetscInt,const PetscInt[],PetscInt,const PetscInt[],const PetscScalar[],InsertMode);
PETSC_EXTERN PetscErrorCode MatSetValuesBlockedLocal(Mat,PetscInt,const PetscInt[],PetscInt,const PetscInt[],const PetscScalar[],InsertMode);

PETSC_EXTERN PetscErrorCode MatStashSetInitialSize(Mat,PetscInt,PetscInt);
PETSC_EXTERN PetscErrorCode MatStashGetInfo(Mat,PetscInt*,PetscInt*,PetscInt*,PetscInt*);

PETSC_EXTERN PetscErrorCode MatInterpolate(Mat,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatInterpolateAdd(Mat,Vec,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatRestrict(Mat,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatMatInterpolate(Mat,Mat,Mat*);
PETSC_EXTERN PetscErrorCode MatMatInterpolateAdd(Mat,Mat,Mat,Mat*);
PETSC_EXTERN PetscErrorCode MatMatRestrict(Mat,Mat,Mat*);
PETSC_EXTERN PetscErrorCode MatCreateVecs(Mat,Vec*,Vec*);
PETSC_DEPRECATED_FUNCTION("Use MatCreateVecs() (since version 3.6)") static inline PetscErrorCode MatGetVecs(Mat mat,Vec *x,Vec *y) {return MatCreateVecs(mat,x,y);}
PETSC_EXTERN PetscErrorCode MatCreateRedundantMatrix(Mat,PetscInt,MPI_Comm,MatReuse,Mat*);
PETSC_EXTERN PetscErrorCode MatGetMultiProcBlock(Mat,MPI_Comm,MatReuse,Mat*);
PETSC_EXTERN PetscErrorCode MatFindZeroDiagonals(Mat,IS*);
PETSC_EXTERN PetscErrorCode MatFindOffBlockDiagonalEntries(Mat,IS*);
PETSC_EXTERN PetscErrorCode MatCreateMPIMatConcatenateSeqMat(MPI_Comm,Mat,PetscInt,MatReuse,Mat*);

/*MC
   MatSetValue - Set a single entry into a matrix.

   Not collective

   Synopsis:
     #include <petscmat.h>
     PetscErrorCode MatSetValue(Mat m,PetscInt row,PetscInt col,PetscScalar value,InsertMode mode)

   Input Parameters:
+  m - the matrix
.  row - the row location of the entry
.  col - the column location of the entry
.  value - the value to insert
-  mode - either INSERT_VALUES or ADD_VALUES

   Notes:
   For efficiency one should use MatSetValues() and set several values simultaneously.

   Level: beginner

.seealso: `MatGetValue()`, `MatSetValues()`, `MatSetValueLocal()`, `MatSetValuesLocal()`
M*/
static inline PetscErrorCode MatSetValue(Mat v,PetscInt i,PetscInt j,PetscScalar va,InsertMode mode) {return MatSetValues(v,1,&i,1,&j,&va,mode);}

/*@C
   MatGetValue - Gets a single value from a matrix

   Not Collective; can only return a value owned by the given process

   Input Parameters:
+  mat - the matrix
.  row - the row location of the entry
-  col - the column location of the entry

   Output Parameter:
.  va - the value

   Notes:
   For efficiency one should use MatGetValues() and get several values simultaneously.

   See notes for MatGetValues().

   Level: advanced

.seealso: `MatSetValue()`, `MatGetValueLocal()`, `MatGetValues()`
@*/
static inline PetscErrorCode MatGetValue(Mat mat,PetscInt row,PetscInt col,PetscScalar *va) {return MatGetValues(mat,1,&row,1,&col,va);}

/*MC
   MatSetValueLocal - Inserts or adds a single value into a matrix,
   using a local numbering of the nodes.

   Not Collective

   Input Parameters:
+  m - the matrix
.  row - the row location of the entry
.  col - the column location of the entry
.  value - the value to insert
-  mode - either INSERT_VALUES or ADD_VALUES

   Notes:
   For efficiency one should use MatSetValuesLocal() and set several values simultaneously.

   See notes for MatSetValuesLocal() for additional information on when and how this function can be used.

   Level: intermediate

.seealso: `MatSetValue()`, `MatSetValuesLocal()`
M*/
static inline PetscErrorCode MatSetValueLocal(Mat v,PetscInt i,PetscInt j,PetscScalar va,InsertMode mode) {return MatSetValuesLocal(v,1,&i,1,&j,&va,mode);}

/*MC
   MatPreallocateBegin - Begins the block of code that will count the number of nonzeros per
       row in a matrix providing the data that one can use to correctly preallocate the matrix.

   Synopsis:
   #include <petscmat.h>
   PetscErrorCode MatPreallocateBegin(MPI_Comm comm, PetscInt nrows, PetscInt ncols, PetscInt *dnz, PetscInt *onz)

   Collective

   Input Parameters:
+  comm - the communicator that will share the eventually allocated matrix
.  nrows - the number of LOCAL rows in the matrix
-  ncols - the number of LOCAL columns in the matrix

   Output Parameters:
+  dnz - the array that will be passed to the matrix preallocation routines
-  onz - the other array passed to the matrix preallocation routines

   Level: intermediate

   Notes:
    This is a macro that handles its own error checking, it does not return an error code.

    See Users-Manual: ch_performance for more details.

    Do not malloc or free dnz and onz, that is handled internally by these routines

   Developer Notes:
    This is a MACRO not a function because it has a leading { that is closed by PetscPreallocateFinalize().

.seealso: `MatPreallocateEnd()`, `MatPreallocateSet()`, `MatPreallocateSymmetricSetBlock()`, `MatPreallocateSetLocal()`,
          `MatPreallocateSymmetricSetLocalBlock()`
M*/
#define MatPreallocateBegin(comm,nrows,ncols,dnz,onz)  do {                             \
  PetscInt __nrows = (nrows),__ncols = (ncols),__rstart,__start,__end = 0;                     \
  PetscCall(PetscCalloc2(__nrows,&(dnz),__nrows,&(onz)));                                        \
  PetscCallMPI(MPI_Scan(&__ncols,&__end,1,MPIU_INT,MPI_SUM,comm));                                \
  __start = __end - __ncols; (void)__start;                                                    \
  PetscCallMPI(MPI_Scan(&__nrows,&__rstart,1,MPIU_INT,MPI_SUM,comm));                             \
  __rstart -= __nrows

#define MatPreallocateInitialize(...) PETSC_DEPRECATED_MACRO("GCC warning \"Use MatPreallocateBegin() (since version 3.18)\"") MatPreallocateBegin(__VA_ARGS__)

/*MC
   MatPreallocateSetLocal - Indicates the locations (rows and columns) in the matrix where nonzeros will be
       inserted using a local number of the rows and columns

   Synopsis:
   #include <petscmat.h>
   PetscErrorCode MatPreallocateSetLocal(ISLocalToGlobalMappping map,PetscInt nrows, PetscInt *rows,PetscInt ncols, PetscInt *cols,PetscInt *dnz, PetscInt *onz)

   Not Collective

   Input Parameters:
+  map - the row mapping from local numbering to global numbering
.  nrows - the number of rows indicated
.  rows - the indices of the rows
.  cmap - the column mapping from local to global numbering
.  ncols - the number of columns in the matrix
.  cols - the columns indicated
.  dnz - the array that will be passed to the matrix preallocation routines
-  onz - the other array passed to the matrix preallocation routines

   Level: intermediate

   Notes:
    See Users-Manual: ch_performance for more details.

   Do not malloc or free dnz and onz, that is handled internally by these routines

.seealso: `MatPreallocateEnd()`, `MatPreallocateSet()`, `MatPreallocateSymmetricSetBlock()`
          `MatPreallocateBegin()`, `MatPreallocateSymmetricSetLocalBlock()`, `MatPreallocateSetLocalRemoveDups()`
M*/
#define MatPreallocateSetLocal(rmap,nrows,rows,cmap,ncols,cols,dnz,onz)                        \
  PetscMacroReturnStandard(                                                                    \
    PetscCall(ISLocalToGlobalMappingApply(rmap,nrows,rows,rows));                                \
    PetscCall(ISLocalToGlobalMappingApply(cmap,ncols,cols,cols));                                \
    for (PetscInt __l=0;__l<nrows;__l++) PetscCall(MatPreallocateSet((rows)[__l],ncols,cols,dnz,onz)); \
  )

/*MC
   MatPreallocateSetLocalRemoveDups - Indicates the locations (rows and columns) in the matrix where nonzeros will be
       inserted using a local number of the rows and columns. This version removes any duplicate columns in cols

   Synopsis:
   #include <petscmat.h>
   PetscErrorCode MatPreallocateSetLocalRemoveDups(ISLocalToGlobalMappping map,PetscInt nrows, PetscInt *rows,PetscInt ncols, PetscInt *cols,PetscInt *dnz, PetscInt *onz)

   Not Collective

   Input Parameters:
+  map - the row mapping from local numbering to global numbering
.  nrows - the number of rows indicated
.  rows - the indices of the rows (these values are mapped to the global values)
.  cmap - the column mapping from local to global numbering
.  ncols - the number of columns in the matrix   (this value will be changed if duplicate columns are found)
.  cols - the columns indicated (these values are mapped to the global values, they are then sorted and duplicates removed)
.  dnz - the array that will be passed to the matrix preallocation routines
-  onz - the other array passed to the matrix preallocation routines

   Level: intermediate

   Notes:
    See Users-Manual: ch_performance for more details.

   Do not malloc or free dnz and onz, that is handled internally by these routines

.seealso: `MatPreallocateEnd()`, `MatPreallocateSet()`, `MatPreallocateSymmetricSetBlock()`
          `MatPreallocateBegin()`, `MatPreallocateSymmetricSetLocalBlock()`, `MatPreallocateSetLocal()`
M*/
#define MatPreallocateSetLocalRemoveDups(rmap,nrows,rows,cmap,ncols,cols,dnz,onz)              \
  PetscMacroReturnStandard(                                                                    \
    PetscCall(ISLocalToGlobalMappingApply(rmap,nrows,rows,rows));                                \
    PetscCall(ISLocalToGlobalMappingApply(cmap,ncols,cols,cols));                                \
    PetscCall(PetscSortRemoveDupsInt(&ncols,cols));                                              \
    for (PetscInt __l=0;__l<nrows;__l++) PetscCall(MatPreallocateSet((rows)[__l],ncols,cols,dnz,onz)); \
  )

/*MC
   MatPreallocateSetLocalBlock - Indicates the locations (rows and columns) in the matrix where nonzeros will be
       inserted using a local number of the rows and columns

   Synopsis:
   #include <petscmat.h>
   PetscErrorCode MatPreallocateSetLocalBlock(ISLocalToGlobalMappping map,PetscInt nrows, PetscInt *rows,PetscInt ncols, PetscInt *cols,PetscInt *dnz, PetscInt *onz)

   Not Collective

   Input Parameters:
+  map - the row mapping from local numbering to global numbering
.  nrows - the number of rows indicated
.  rows - the indices of the rows
.  cmap - the column mapping from local to global numbering
.  ncols - the number of columns in the matrix
.  cols - the columns indicated
.  dnz - the array that will be passed to the matrix preallocation routines
-  onz - the other array passed to the matrix preallocation routines

   Level: intermediate

   Notes:
    See Users-Manual: ch_performance for more details.

   Do not malloc or free dnz and onz, that is handled internally by these routines

.seealso: `MatPreallocateEnd()`, `MatPreallocateSet()`, `MatPreallocateSymmetricSetBlock()`
          `MatPreallocateBegin()`, `MatPreallocateSymmetricSetLocalBlock()`
M*/
#define MatPreallocateSetLocalBlock(rmap,nrows,rows,cmap,ncols,cols,dnz,onz)                   \
  PetscMacroReturnStandard(                                                                    \
    PetscCall(ISLocalToGlobalMappingApplyBlock(rmap,nrows,rows,rows));                           \
    PetscCall(ISLocalToGlobalMappingApplyBlock(cmap,ncols,cols,cols));                           \
    for (PetscInt __l=0;__l<nrows;__l++) PetscCall(MatPreallocateSet((rows)[__l],ncols,cols,dnz,onz)); \
  )

/*MC
   MatPreallocateSymmetricSetLocalBlock - Indicates the locations (rows and columns) in the matrix where nonzeros will be
       inserted using a local number of the rows and columns

   Synopsis:
   #include <petscmat.h>
   PetscErrorCode MatPreallocateSymmetricSetLocalBlock(ISLocalToGlobalMappping map,PetscInt nrows, PetscInt *rows,PetscInt ncols, PetscInt *cols,PetscInt *dnz, PetscInt *onz)

   Not Collective

   Input Parameters:
+  map - the mapping between local numbering and global numbering
.  nrows - the number of rows indicated
.  rows - the indices of the rows
.  ncols - the number of columns in the matrix
.  cols - the columns indicated
.  dnz - the array that will be passed to the matrix preallocation routines
-  onz - the other array passed to the matrix preallocation routines

   Level: intermediate

   Notes:
    See Users-Manual: ch_performance for more details.

   Do not malloc or free dnz and onz that is handled internally by these routines

.seealso: `MatPreallocateEnd()`, `MatPreallocateSet()`
          `MatPreallocateBegin()`, `MatPreallocateSetLocal()`
M*/
#define MatPreallocateSymmetricSetLocalBlock(map,nrows,rows,ncols,cols,dnz,onz)                \
  PetscMacroReturnStandard(                                                                    \
    PetscCall(ISLocalToGlobalMappingApplyBlock(map,nrows,rows,rows));                            \
    PetscCall(ISLocalToGlobalMappingApplyBlock(map,ncols,cols,cols));                            \
    for (PetscInt __l=0;__l<nrows;__l++) PetscCall(MatPreallocateSymmetricSetBlock((rows)[__l],ncols,cols,dnz,onz)); \
  )

/*MC
   MatPreallocateSet - Indicates the locations (rows and columns) in the matrix where nonzeros will be
       inserted using a local number of the rows and columns

   Synopsis:
   #include <petscmat.h>
   PetscErrorCode MatPreallocateSet(PetscInt nrows, PetscInt *rows,PetscInt ncols, PetscInt *cols,PetscInt *dnz, PetscInt *onz)

   Not Collective

   Input Parameters:
+  row - the row
.  ncols - the number of columns in the matrix
-  cols - the columns indicated

   Output Parameters:
+  dnz - the array that will be passed to the matrix preallocation routines
-  onz - the other array passed to the matrix preallocation routines

   Level: intermediate

   Notes:
    See Users-Manual: ch_performance for more details.

   Do not malloc or free dnz and onz that is handled internally by these routines

   This is a MACRO not a function because it uses variables declared in MatPreallocateBegin().

.seealso: `MatPreallocateEnd()`, `MatPreallocateSet()`, `MatPreallocateSymmetricSetBlock()`
          `MatPreallocateBegin()`, `MatPreallocateSetLocal()`
M*/
#define MatPreallocateSet(row,nc,cols,dnz,onz) PetscMacroReturnStandard(                       \
    PetscCheck(row >= __rstart,PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE,"Trying to set preallocation for row %" PetscInt_FMT " less than first local row %" PetscInt_FMT,row,__rstart); \
    PetscCheck(row < __rstart+__nrows,PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE,"Trying to set preallocation for row %" PetscInt_FMT " greater than last local row %" PetscInt_FMT,row,__rstart+__nrows-1); \
    for (PetscInt __i = 0; __i < nc; ++__i) {                                                  \
      if ((cols)[__i] < __start || (cols)[__i] >= __end) onz[row - __rstart]++;                \
      else if (dnz[row - __rstart] < __ncols) dnz[row - __rstart]++;                           \
    }                                                                                          \
  )

/*MC
   MatPreallocateSymmetricSetBlock - Indicates the locations (rows and columns) in the matrix where nonzeros will be
       inserted using a local number of the rows and columns

   Synopsis:
   #include <petscmat.h>
   PetscErrorCode MatPreallocateSymmetricSetBlock(PetscInt nrows, PetscInt *rows,PetscInt ncols, PetscInt *cols,PetscInt *dnz, PetscInt *onz)

   Not Collective

   Input Parameters:
+  nrows - the number of rows indicated
.  rows - the indices of the rows
.  ncols - the number of columns in the matrix
.  cols - the columns indicated
.  dnz - the array that will be passed to the matrix preallocation routines
-  onz - the other array passed to the matrix preallocation routines

   Level: intermediate

   Notes:
    See Users-Manual: ch_performance for more details.

   Do not malloc or free dnz and onz that is handled internally by these routines

   This is a MACRO not a function because it uses variables declared in MatPreallocateBegin().

.seealso: `MatPreallocateEnd()`, `MatPreallocateSet()`, `MatPreallocateBegin()`,
          `MatPreallocateSymmetricSetLocalBlock()`, `MatPreallocateSetLocal()`
M*/
#define MatPreallocateSymmetricSetBlock(row,nc,cols,dnz,onz)                                   \
  PetscMacroReturnStandard(                                                                    \
    for (PetscInt __i=0; __i<nc; __i++) {                                                      \
      if (cols[__i] >= __end) onz[row - __rstart]++;                                           \
      else if (cols[__i] >= row && dnz[row - __rstart] < __ncols) dnz[row - __rstart]++;       \
    }                                                                                          \
  )

/*MC
   MatPreallocateLocation -  An alternative to MatPreallocateSet() that puts the nonzero locations into the matrix if it exists

   Synopsis:
   #include <petscmat.h>
   PetscErrorCode MatPreallocateLocations(Mat A,PetscInt row,PetscInt ncols,PetscInt *cols,PetscInt *dnz,PetscInt *onz)

   Not Collective

   Input Parameters:
+  A - matrix
.  row - row where values exist (must be local to this process)
.  ncols - number of columns
.  cols - columns with nonzeros
.  dnz - the array that will be passed to the matrix preallocation routines
-  onz - the other array passed to the matrix preallocation routines

   Level: intermediate

   Notes:
    See Users-Manual: ch_performance for more details.

   Do not malloc or free dnz and onz that is handled internally by these routines

   This is a MACRO not a function because it uses a bunch of variables private to the MatPreallocation.... routines.

.seealso: `MatPreallocateBegin()`, `MatPreallocateSet()`, `MatPreallocateSymmetricSetBlock()`, `MatPreallocateSetLocal()`,
          `MatPreallocateSymmetricSetLocalBlock()`
M*/
#define MatPreallocateLocation(A,row,ncols,cols,dnz,onz)  (A ? MatSetValues(A,1,&row,ncols,cols,NULL,INSERT_VALUES) : MatPreallocateSet(row,ncols,cols,dnz,onz))

/*MC
   MatPreallocateEnd - Ends the block of code that will count the number of nonzeros per
       row in a matrix providing the data that one can use to correctly preallocate the matrix.

   Synopsis:
   #include <petscmat.h>
   PetscErrorCode MatPreallocateEnd(PetscInt *dnz, PetscInt *onz)

   Collective

   Input Parameters:
+  dnz - the array that was be passed to the matrix preallocation routines
-  onz - the other array passed to the matrix preallocation routines

   Level: intermediate

   Notes:
    This is a macro that handles its own error checking, it does not return an error code.

    See Users-Manual: ch_performance for more details.

    Do not malloc or free dnz and onz, that is handled internally by these routines

   Developer Notes:
    This is a MACRO not a function because it closes the { started in MatPreallocateBegin().

.seealso: `MatPreallocateBegin()`, `MatPreallocateSet()`, `MatPreallocateSymmetricSetBlock()`, `MatPreallocateSetLocal()`,
          `MatPreallocateSymmetricSetLocalBlock()`
M*/
#define MatPreallocateEnd(dnz,onz) PetscCall(PetscFree2(dnz,onz));} while (0)

#define MatPreallocateFinalize(...) PETSC_DEPRECATED_MACRO("GCC warning \"Use MatPreallocateEnd() (since version 3.18)\"") MatPreallocateEnd(__VA_ARGS__)

/* Routines unique to particular data structures */
PETSC_EXTERN PetscErrorCode MatShellGetContext(Mat,void *);

PETSC_EXTERN PetscErrorCode MatInodeAdjustForInodes(Mat,IS*,IS*);
PETSC_EXTERN PetscErrorCode MatInodeGetInodeSizes(Mat,PetscInt *,PetscInt *[],PetscInt *);

PETSC_EXTERN PetscErrorCode MatSeqAIJSetColumnIndices(Mat,PetscInt[]);
PETSC_EXTERN PetscErrorCode MatSeqBAIJSetColumnIndices(Mat,PetscInt[]);
PETSC_EXTERN PetscErrorCode MatCreateSeqAIJWithArrays(MPI_Comm,PetscInt,PetscInt,PetscInt[],PetscInt[],PetscScalar[],Mat*);
PETSC_EXTERN PetscErrorCode MatCreateSeqBAIJWithArrays(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt[],PetscInt[],PetscScalar[],Mat*);
PETSC_EXTERN PetscErrorCode MatCreateSeqSBAIJWithArrays(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt[],PetscInt[],PetscScalar[],Mat*);
PETSC_EXTERN PetscErrorCode MatCreateSeqAIJFromTriple(MPI_Comm,PetscInt,PetscInt,PetscInt[],PetscInt[],PetscScalar[],Mat*,PetscInt,PetscBool);

#define MAT_SKIP_ALLOCATION -4

PETSC_EXTERN PetscErrorCode MatSeqBAIJSetPreallocation(Mat,PetscInt,PetscInt,const PetscInt[]);
PETSC_EXTERN PetscErrorCode MatSeqSBAIJSetPreallocation(Mat,PetscInt,PetscInt,const PetscInt[]);
PETSC_EXTERN PetscErrorCode MatSeqAIJSetPreallocation(Mat,PetscInt,const PetscInt[]);
PETSC_EXTERN PetscErrorCode MatSeqAIJSetTotalPreallocation(Mat,PetscInt);

PETSC_EXTERN PetscErrorCode MatMPIBAIJSetPreallocation(Mat,PetscInt,PetscInt,const PetscInt[],PetscInt,const PetscInt[]);
PETSC_EXTERN PetscErrorCode MatMPISBAIJSetPreallocation(Mat,PetscInt,PetscInt,const PetscInt[],PetscInt,const PetscInt[]);
PETSC_EXTERN PetscErrorCode MatMPIAIJSetPreallocation(Mat,PetscInt,const PetscInt[],PetscInt,const PetscInt[]);
PETSC_EXTERN PetscErrorCode MatSeqAIJSetPreallocationCSR(Mat,const PetscInt [],const PetscInt [],const PetscScalar []);
PETSC_EXTERN PetscErrorCode MatSeqBAIJSetPreallocationCSR(Mat,PetscInt,const PetscInt[],const PetscInt[],const PetscScalar[]);
PETSC_EXTERN PetscErrorCode MatMPIAIJSetPreallocationCSR(Mat,const PetscInt[],const PetscInt[],const PetscScalar[]);
PETSC_EXTERN PetscErrorCode MatMPIBAIJSetPreallocationCSR(Mat,PetscInt,const PetscInt[],const PetscInt[],const PetscScalar[]);
PETSC_EXTERN PetscErrorCode MatMPIAdjSetPreallocation(Mat,PetscInt[],PetscInt[],PetscInt[]);
PETSC_EXTERN PetscErrorCode MatMPIAdjToSeq(Mat,Mat*);
PETSC_EXTERN PetscErrorCode MatMPIDenseSetPreallocation(Mat,PetscScalar[]);
PETSC_EXTERN PetscErrorCode MatSeqDenseSetPreallocation(Mat,PetscScalar[]);
PETSC_EXTERN PetscErrorCode MatMPIAIJGetSeqAIJ(Mat,Mat*,Mat*,const PetscInt*[]);
PETSC_EXTERN PetscErrorCode MatMPIBAIJGetSeqBAIJ(Mat,Mat*,Mat*,const PetscInt*[]);
PETSC_EXTERN PetscErrorCode MatMPIAdjCreateNonemptySubcommMat(Mat,Mat*);

PETSC_EXTERN PetscErrorCode MatDenseGetLDA(Mat,PetscInt*);
PETSC_EXTERN PetscErrorCode MatDenseSetLDA(Mat,PetscInt);
PETSC_DEPRECATED_FUNCTION("Use MatDenseSetLDA() (since version 3.14)") static inline PetscErrorCode MatSeqDenseSetLDA(Mat A,PetscInt lda) {return MatDenseSetLDA(A,lda);}
PETSC_EXTERN PetscErrorCode MatDenseGetLocalMatrix(Mat,Mat*);

PETSC_EXTERN PetscErrorCode MatBlockMatSetPreallocation(Mat,PetscInt,PetscInt,const PetscInt[]);

PETSC_EXTERN PetscErrorCode MatStoreValues(Mat);
PETSC_EXTERN PetscErrorCode MatRetrieveValues(Mat);

PETSC_EXTERN PetscErrorCode MatFindNonzeroRows(Mat,IS*);
PETSC_EXTERN PetscErrorCode MatFindZeroRows(Mat,IS*);
/*
  These routines are not usually accessed directly, rather solving is
  done through the KSP and PC interfaces.
*/

/*J
    MatOrderingType - String with the name of a PETSc matrix ordering

   Level: beginner

   Notes:
      If MATORDERINGEXTERNAL is used then PETSc does not compute an ordering and utilizes one built into the factorization package

.seealso: `MatGetOrdering()`
J*/
typedef const char* MatOrderingType;
#define MATORDERINGNATURAL        "natural"
#define MATORDERINGND             "nd"
#define MATORDERING1WD            "1wd"
#define MATORDERINGRCM            "rcm"
#define MATORDERINGQMD            "qmd"
#define MATORDERINGROWLENGTH      "rowlength"
#define MATORDERINGWBM            "wbm"
#define MATORDERINGSPECTRAL       "spectral"
#define MATORDERINGAMD            "amd"            /* only works if UMFPACK is installed with PETSc */
#define MATORDERINGMETISND        "metisnd"        /* only works if METIS is installed with PETSc */
#define MATORDERINGNATURAL_OR_ND  "natural_or_nd"  /* special coase used for Cholesky and ICC, allows ND when AIJ matrix is used but Natural when SBAIJ is used */
#define MATORDERINGEXTERNAL       "external"       /* uses an ordering type internal to the factorization package */

PETSC_EXTERN PetscErrorCode MatGetOrdering(Mat,MatOrderingType,IS*,IS*);
PETSC_EXTERN PetscErrorCode MatGetOrderingList(PetscFunctionList*);
PETSC_EXTERN PetscErrorCode MatOrderingRegister(const char[],PetscErrorCode(*)(Mat,MatOrderingType,IS*,IS*));
PETSC_EXTERN PetscFunctionList MatOrderingList;

PETSC_EXTERN PetscErrorCode MatReorderForNonzeroDiagonal(Mat,PetscReal,IS,IS);
PETSC_EXTERN PetscErrorCode MatCreateLaplacian(Mat,PetscReal,PetscBool,Mat*);

PETSC_EXTERN PetscErrorCode MatFactorGetPreferredOrdering(Mat,MatFactorType,MatOrderingType*);

/*S
    MatFactorShiftType - Numeric Shift for factorizations

   Level: beginner

.seealso: `MatGetFactor()`
S*/
typedef enum {MAT_SHIFT_NONE,MAT_SHIFT_NONZERO,MAT_SHIFT_POSITIVE_DEFINITE,MAT_SHIFT_INBLOCKS} MatFactorShiftType;
PETSC_EXTERN const char *const MatFactorShiftTypes[];
PETSC_EXTERN const char *const MatFactorShiftTypesDetail[];

/*S
    MatFactorError - indicates what type of error was generated in a matrix factorization

    Level: beginner

    Developer Notes:
    Any additions/changes here MUST also be made in include/petsc/finclude/petscmat.h

.seealso: `MatGetFactor()`
S*/
typedef enum {MAT_FACTOR_NOERROR,MAT_FACTOR_STRUCT_ZEROPIVOT,MAT_FACTOR_NUMERIC_ZEROPIVOT,MAT_FACTOR_OUTMEMORY,MAT_FACTOR_OTHER} MatFactorError;

PETSC_EXTERN PetscErrorCode MatFactorGetError(Mat,MatFactorError*);
PETSC_EXTERN PetscErrorCode MatFactorClearError(Mat);
PETSC_EXTERN PetscErrorCode MatFactorGetErrorZeroPivot(Mat,PetscReal*,PetscInt*);

/*S
   MatFactorInfo - Data passed into the matrix factorization routines, and information about the resulting factorization

   In Fortran these are simply double precision arrays of size MAT_FACTORINFO_SIZE, that is use
$     MatFactorInfo  info(MAT_FACTORINFO_SIZE)

   Notes:
    These are not usually directly used by users, instead use PC type of LU, ILU, CHOLESKY or ICC.

      You can use MatFactorInfoInitialize() to set default values.

   Level: developer

.seealso: `MatLUFactorSymbolic()`, `MatILUFactorSymbolic()`, `MatCholeskyFactorSymbolic()`, `MatICCFactorSymbolic()`, `MatICCFactor()`,
          `MatFactorInfoInitialize()`

S*/
typedef struct {
  PetscReal     diagonal_fill;  /* force diagonal to fill in if initially not filled */
  PetscReal     usedt;
  PetscReal     dt;             /* drop tolerance */
  PetscReal     dtcol;          /* tolerance for pivoting */
  PetscReal     dtcount;        /* maximum nonzeros to be allowed per row */
  PetscReal     fill;           /* expected fill, nonzeros in factored matrix/nonzeros in original matrix */
  PetscReal     levels;         /* ICC/ILU(levels) */
  PetscReal     pivotinblocks;  /* for BAIJ and SBAIJ matrices pivot in factorization on blocks, default 1.0
                                   factorization may be faster if do not pivot */
  PetscReal     zeropivot;      /* pivot is called zero if less than this */
  PetscReal     shifttype;      /* type of shift added to matrix factor to prevent zero pivots */
  PetscReal     shiftamount;     /* how large the shift is */
} MatFactorInfo;

PETSC_EXTERN PetscErrorCode MatFactorInfoInitialize(MatFactorInfo*);
PETSC_EXTERN PetscErrorCode MatCholeskyFactor(Mat,IS,const MatFactorInfo*);
PETSC_EXTERN PetscErrorCode MatCholeskyFactorSymbolic(Mat,Mat,IS,const MatFactorInfo*);
PETSC_EXTERN PetscErrorCode MatCholeskyFactorNumeric(Mat,Mat,const MatFactorInfo*);
PETSC_EXTERN PetscErrorCode MatLUFactor(Mat,IS,IS,const MatFactorInfo*);
PETSC_EXTERN PetscErrorCode MatILUFactor(Mat,IS,IS,const MatFactorInfo*);
PETSC_EXTERN PetscErrorCode MatLUFactorSymbolic(Mat,Mat,IS,IS,const MatFactorInfo*);
PETSC_EXTERN PetscErrorCode MatILUFactorSymbolic(Mat,Mat,IS,IS,const MatFactorInfo*);
PETSC_EXTERN PetscErrorCode MatICCFactorSymbolic(Mat,Mat,IS,const MatFactorInfo*);
PETSC_EXTERN PetscErrorCode MatICCFactor(Mat,IS,const MatFactorInfo*);
PETSC_EXTERN PetscErrorCode MatLUFactorNumeric(Mat,Mat,const MatFactorInfo*);
PETSC_EXTERN PetscErrorCode MatQRFactor(Mat,IS,const MatFactorInfo*);
PETSC_EXTERN PetscErrorCode MatQRFactorSymbolic(Mat,Mat,IS,const MatFactorInfo*);
PETSC_EXTERN PetscErrorCode MatQRFactorNumeric(Mat,Mat,const MatFactorInfo*);
PETSC_EXTERN PetscErrorCode MatGetInertia(Mat,PetscInt*,PetscInt*,PetscInt*);
PETSC_EXTERN PetscErrorCode MatSolve(Mat,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatForwardSolve(Mat,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatBackwardSolve(Mat,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatSolveAdd(Mat,Vec,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatSolveTranspose(Mat,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatSolveTransposeAdd(Mat,Vec,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatSolves(Mat,Vecs,Vecs);
PETSC_EXTERN PetscErrorCode MatSetUnfactored(Mat);

typedef enum {MAT_FACTOR_SCHUR_UNFACTORED, MAT_FACTOR_SCHUR_FACTORED, MAT_FACTOR_SCHUR_INVERTED} MatFactorSchurStatus;
PETSC_EXTERN PetscErrorCode MatFactorSetSchurIS(Mat,IS);
PETSC_EXTERN PetscErrorCode MatFactorGetSchurComplement(Mat,Mat*,MatFactorSchurStatus*);
PETSC_EXTERN PetscErrorCode MatFactorRestoreSchurComplement(Mat,Mat*,MatFactorSchurStatus);
PETSC_EXTERN PetscErrorCode MatFactorInvertSchurComplement(Mat);
PETSC_EXTERN PetscErrorCode MatFactorCreateSchurComplement(Mat,Mat*,MatFactorSchurStatus*);
PETSC_EXTERN PetscErrorCode MatFactorSolveSchurComplement(Mat,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatFactorSolveSchurComplementTranspose(Mat,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatFactorFactorizeSchurComplement(Mat);

PETSC_EXTERN PetscErrorCode MatSeqDenseInvert(Mat);
/*E
    MatSORType - What type of (S)SOR to perform

    Level: beginner

   May be bitwise ORd together

   Any additions/changes here MUST also be made in include/petsc/finclude/petscmat.h

   MatSORType may be bitwise ORd together, so do not change the numbers

.seealso: `MatSOR()`
E*/
typedef enum {SOR_FORWARD_SWEEP=1,SOR_BACKWARD_SWEEP=2,SOR_SYMMETRIC_SWEEP=3,
              SOR_LOCAL_FORWARD_SWEEP=4,SOR_LOCAL_BACKWARD_SWEEP=8,
              SOR_LOCAL_SYMMETRIC_SWEEP=12,SOR_ZERO_INITIAL_GUESS=16,
              SOR_EISENSTAT=32,SOR_APPLY_UPPER=64,SOR_APPLY_LOWER=128} MatSORType;
PETSC_EXTERN PetscErrorCode MatSOR(Mat,Vec,PetscReal,MatSORType,PetscReal,PetscInt,PetscInt,Vec);

/*
    These routines are for efficiently computing Jacobians via finite differences.
*/

/*S
     MatColoring - Object for managing the coloring of matrices.

   Level: beginner

    Notes:
       Coloring of matrices can be computed directly from the sparse matrix nonzero structure via the MatColoring object or from the mesh from which the
       matrix comes from via DMCreateColoring(). In general using the mesh produces a more optimal coloring (fewer colors).

       Once a coloring is available MatFDColoringCreate() creates an object that can be used to efficiently compute Jacobians using that coloring. This
       same object can also be used to efficiently convert data created by Automatic Differentation tools to PETSc sparse matrices.

.seealso: `MatFDColoringCreate()`, `MatColoringWeightType`, `ISColoring`, `MatFDColoring`, `DMCreateColoring()`, `MatColoringCreate()`, `MatOrdering`, `MatPartitioning`, `MatColoringType`
S*/
typedef struct _p_MatColoring* MatColoring;

/*J
    MatColoringType - String with the name of a PETSc matrix coloring

   Level: beginner

.seealso: `MatColoringSetType()`, `MatColoring`
J*/
typedef const  char*           MatColoringType;
#define MATCOLORINGJP      "jp"
#define MATCOLORINGPOWER   "power"
#define MATCOLORINGNATURAL "natural"
#define MATCOLORINGSL      "sl"
#define MATCOLORINGLF      "lf"
#define MATCOLORINGID      "id"
#define MATCOLORINGGREEDY  "greedy"

/*E
   MatColoringWeightType - Type of weight scheme

    Not Collective

+   MAT_COLORING_RANDOM  - Random weights
.   MAT_COLORING_LEXICAL - Lexical weighting based upon global numbering.
-   MAT_COLORING_LF      - Last-first weighting.

    Level: intermediate

   Any additions/changes here MUST also be made in include/petsc/finclude/petscmat.h

.seealso: `MatColoring`, `MatColoringCreate()`
E*/
typedef enum {MAT_COLORING_WEIGHT_RANDOM,MAT_COLORING_WEIGHT_LEXICAL,MAT_COLORING_WEIGHT_LF,MAT_COLORING_WEIGHT_SL} MatColoringWeightType;

PETSC_EXTERN PetscErrorCode MatColoringCreate(Mat,MatColoring*);
PETSC_EXTERN PetscErrorCode MatColoringGetDegrees(Mat,PetscInt,PetscInt*);
PETSC_EXTERN PetscErrorCode MatColoringDestroy(MatColoring*);
PETSC_EXTERN PetscErrorCode MatColoringView(MatColoring,PetscViewer);
PETSC_EXTERN PetscErrorCode MatColoringSetType(MatColoring,MatColoringType);
PETSC_EXTERN PetscErrorCode MatColoringSetFromOptions(MatColoring);
PETSC_EXTERN PetscErrorCode MatColoringSetDistance(MatColoring,PetscInt);
PETSC_EXTERN PetscErrorCode MatColoringGetDistance(MatColoring,PetscInt*);
PETSC_EXTERN PetscErrorCode MatColoringSetMaxColors(MatColoring,PetscInt);
PETSC_EXTERN PetscErrorCode MatColoringGetMaxColors(MatColoring,PetscInt*);
PETSC_EXTERN PetscErrorCode MatColoringApply(MatColoring,ISColoring*);
PETSC_EXTERN PetscErrorCode MatColoringRegister(const char[],PetscErrorCode(*)(MatColoring));
PETSC_EXTERN PetscErrorCode MatColoringPatch(Mat,PetscInt,PetscInt,ISColoringValue[],ISColoring*);
PETSC_EXTERN PetscErrorCode MatColoringSetWeightType(MatColoring,MatColoringWeightType);
PETSC_EXTERN PetscErrorCode MatColoringSetWeights(MatColoring,PetscReal*,PetscInt*);
PETSC_EXTERN PetscErrorCode MatColoringCreateWeights(MatColoring,PetscReal **,PetscInt **lperm);
PETSC_EXTERN PetscErrorCode MatColoringTest(MatColoring,ISColoring);
PETSC_DEPRECATED_FUNCTION("Use MatColoringTest() (since version 3.10)") static inline PetscErrorCode MatColoringTestValid(MatColoring matcoloring,ISColoring iscoloring) {return MatColoringTest(matcoloring,iscoloring);}
PETSC_EXTERN PetscErrorCode MatISColoringTest(Mat,ISColoring);

/*S
     MatFDColoring - Object for computing a sparse Jacobian via finite differences
        and coloring

   Level: beginner

   Notes:
      This object is creating utilizing a coloring provided by the MatColoring object or DMCreateColoring()

.seealso: `MatFDColoringCreate()`, `MatColoring`, `DMCreateColoring()`
S*/
typedef struct _p_MatFDColoring* MatFDColoring;

PETSC_EXTERN PetscErrorCode MatFDColoringCreate(Mat,ISColoring,MatFDColoring *);
PETSC_EXTERN PetscErrorCode MatFDColoringDestroy(MatFDColoring*);
PETSC_EXTERN PetscErrorCode MatFDColoringView(MatFDColoring,PetscViewer);
PETSC_EXTERN PetscErrorCode MatFDColoringSetFunction(MatFDColoring,PetscErrorCode (*)(void),void*);
PETSC_EXTERN PetscErrorCode MatFDColoringGetFunction(MatFDColoring,PetscErrorCode (**)(void),void**);
PETSC_EXTERN PetscErrorCode MatFDColoringSetParameters(MatFDColoring,PetscReal,PetscReal);
PETSC_EXTERN PetscErrorCode MatFDColoringSetFromOptions(MatFDColoring);
PETSC_EXTERN PetscErrorCode MatFDColoringApply(Mat,MatFDColoring,Vec,void *);
PETSC_EXTERN PetscErrorCode MatFDColoringSetF(MatFDColoring,Vec);
PETSC_EXTERN PetscErrorCode MatFDColoringGetPerturbedColumns(MatFDColoring,PetscInt*,const PetscInt*[]);
PETSC_EXTERN PetscErrorCode MatFDColoringSetUp(Mat,ISColoring,MatFDColoring);
PETSC_EXTERN PetscErrorCode MatFDColoringSetBlockSize(MatFDColoring,PetscInt,PetscInt);
PETSC_EXTERN PetscErrorCode MatFDColoringSetValues(Mat,MatFDColoring,const PetscScalar*);

/*S
     MatTransposeColoring - Object for computing a sparse matrix product C=A*B^T via coloring

   Level: beginner

.seealso: `MatTransposeColoringCreate()`
S*/
typedef struct _p_MatTransposeColoring* MatTransposeColoring;

PETSC_EXTERN PetscErrorCode MatTransposeColoringCreate(Mat,ISColoring,MatTransposeColoring *);
PETSC_EXTERN PetscErrorCode MatTransColoringApplySpToDen(MatTransposeColoring,Mat,Mat);
PETSC_EXTERN PetscErrorCode MatTransColoringApplyDenToSp(MatTransposeColoring,Mat,Mat);
PETSC_EXTERN PetscErrorCode MatTransposeColoringDestroy(MatTransposeColoring*);

/*
    These routines are for partitioning matrices: currently used only
  for adjacency matrix, MatCreateMPIAdj().
*/

/*S
     MatPartitioning - Object for managing the partitioning of a matrix or graph

   Level: beginner

   Notes:
     There is also a PetscPartitioner object that provides the same functionality. It can utilize the MatPartitioning operations
     via PetscPartitionerSetType(p,PETSCPARTITIONERMATPARTITIONING)

   Developers Note:
     It is an extra maintainance and documentation cost to have two objects with the same functionality.

.seealso: `MatPartitioningCreate()`, `MatPartitioningType`, `MatColoring`, `MatGetOrdering()`
S*/
typedef struct _p_MatPartitioning* MatPartitioning;

/*J
    MatPartitioningType - String with the name of a PETSc matrix partitioning

   Level: beginner
dm
.seealso: `MatPartitioningCreate()`, `MatPartitioning`
J*/
typedef const char* MatPartitioningType;
#define MATPARTITIONINGCURRENT  "current"
#define MATPARTITIONINGAVERAGE   "average"
#define MATPARTITIONINGSQUARE   "square"
#define MATPARTITIONINGPARMETIS "parmetis"
#define MATPARTITIONINGCHACO    "chaco"
#define MATPARTITIONINGPARTY    "party"
#define MATPARTITIONINGPTSCOTCH "ptscotch"
#define MATPARTITIONINGHIERARCH  "hierarch"

PETSC_EXTERN PetscErrorCode MatPartitioningCreate(MPI_Comm,MatPartitioning*);
PETSC_EXTERN PetscErrorCode MatPartitioningSetType(MatPartitioning,MatPartitioningType);
PETSC_EXTERN PetscErrorCode MatPartitioningSetNParts(MatPartitioning,PetscInt);
PETSC_EXTERN PetscErrorCode MatPartitioningSetAdjacency(MatPartitioning,Mat);
PETSC_EXTERN PetscErrorCode MatPartitioningSetVertexWeights(MatPartitioning,const PetscInt[]);
PETSC_EXTERN PetscErrorCode MatPartitioningSetPartitionWeights(MatPartitioning,const PetscReal []);
PETSC_EXTERN PetscErrorCode MatPartitioningSetUseEdgeWeights(MatPartitioning,PetscBool);
PETSC_EXTERN PetscErrorCode MatPartitioningGetUseEdgeWeights(MatPartitioning,PetscBool*);
PETSC_EXTERN PetscErrorCode MatPartitioningApply(MatPartitioning,IS*);
PETSC_EXTERN PetscErrorCode MatPartitioningImprove(MatPartitioning,IS*);
PETSC_EXTERN PetscErrorCode MatPartitioningViewImbalance(MatPartitioning,IS);
PETSC_EXTERN PetscErrorCode MatPartitioningApplyND(MatPartitioning,IS*);
PETSC_EXTERN PetscErrorCode MatPartitioningDestroy(MatPartitioning*);
PETSC_EXTERN PetscErrorCode MatPartitioningRegister(const char[],PetscErrorCode (*)(MatPartitioning));
PETSC_EXTERN PetscErrorCode MatPartitioningView(MatPartitioning,PetscViewer);
PETSC_EXTERN PetscErrorCode MatPartitioningViewFromOptions(MatPartitioning,PetscObject,const char[]);
PETSC_EXTERN PetscErrorCode MatPartitioningSetFromOptions(MatPartitioning);
PETSC_EXTERN PetscErrorCode MatPartitioningGetType(MatPartitioning,MatPartitioningType*);

PETSC_EXTERN PetscErrorCode MatPartitioningParmetisSetRepartition(MatPartitioning part);
PETSC_EXTERN PetscErrorCode MatPartitioningParmetisSetCoarseSequential(MatPartitioning);
PETSC_EXTERN PetscErrorCode MatPartitioningParmetisGetEdgeCut(MatPartitioning, PetscInt *);

typedef enum { MP_CHACO_MULTILEVEL=1,MP_CHACO_SPECTRAL=2,MP_CHACO_LINEAR=4,MP_CHACO_RANDOM=5,MP_CHACO_SCATTERED=6 } MPChacoGlobalType;
PETSC_EXTERN const char *const MPChacoGlobalTypes[];
typedef enum { MP_CHACO_KERNIGHAN=1,MP_CHACO_NONE=2 } MPChacoLocalType;
PETSC_EXTERN const char *const MPChacoLocalTypes[];
typedef enum { MP_CHACO_LANCZOS=0,MP_CHACO_RQI=1 } MPChacoEigenType;
PETSC_EXTERN const char *const MPChacoEigenTypes[];

PETSC_EXTERN PetscErrorCode MatPartitioningChacoSetGlobal(MatPartitioning,MPChacoGlobalType);
PETSC_EXTERN PetscErrorCode MatPartitioningChacoGetGlobal(MatPartitioning,MPChacoGlobalType*);
PETSC_EXTERN PetscErrorCode MatPartitioningChacoSetLocal(MatPartitioning,MPChacoLocalType);
PETSC_EXTERN PetscErrorCode MatPartitioningChacoGetLocal(MatPartitioning,MPChacoLocalType*);
PETSC_EXTERN PetscErrorCode MatPartitioningChacoSetCoarseLevel(MatPartitioning,PetscReal);
PETSC_EXTERN PetscErrorCode MatPartitioningChacoSetEigenSolver(MatPartitioning,MPChacoEigenType);
PETSC_EXTERN PetscErrorCode MatPartitioningChacoGetEigenSolver(MatPartitioning,MPChacoEigenType*);
PETSC_EXTERN PetscErrorCode MatPartitioningChacoSetEigenTol(MatPartitioning,PetscReal);
PETSC_EXTERN PetscErrorCode MatPartitioningChacoGetEigenTol(MatPartitioning,PetscReal*);
PETSC_EXTERN PetscErrorCode MatPartitioningChacoSetEigenNumber(MatPartitioning,PetscInt);
PETSC_EXTERN PetscErrorCode MatPartitioningChacoGetEigenNumber(MatPartitioning,PetscInt*);

#define MP_PARTY_OPT "opt"
#define MP_PARTY_LIN "lin"
#define MP_PARTY_SCA "sca"
#define MP_PARTY_RAN "ran"
#define MP_PARTY_GBF "gbf"
#define MP_PARTY_GCF "gcf"
#define MP_PARTY_BUB "bub"
#define MP_PARTY_DEF "def"
PETSC_EXTERN PetscErrorCode MatPartitioningPartySetGlobal(MatPartitioning,const char*);
#define MP_PARTY_HELPFUL_SETS "hs"
#define MP_PARTY_KERNIGHAN_LIN "kl"
#define MP_PARTY_NONE "no"
PETSC_EXTERN PetscErrorCode MatPartitioningPartySetLocal(MatPartitioning,const char*);
PETSC_EXTERN PetscErrorCode MatPartitioningPartySetCoarseLevel(MatPartitioning,PetscReal);
PETSC_EXTERN PetscErrorCode MatPartitioningPartySetBipart(MatPartitioning,PetscBool);
PETSC_EXTERN PetscErrorCode MatPartitioningPartySetMatchOptimization(MatPartitioning,PetscBool);

typedef enum { MP_PTSCOTCH_DEFAULT,MP_PTSCOTCH_QUALITY,MP_PTSCOTCH_SPEED,MP_PTSCOTCH_BALANCE,MP_PTSCOTCH_SAFETY,MP_PTSCOTCH_SCALABILITY } MPPTScotchStrategyType;
PETSC_EXTERN const char *const MPPTScotchStrategyTypes[];

PETSC_EXTERN PetscErrorCode MatPartitioningPTScotchSetImbalance(MatPartitioning,PetscReal);
PETSC_EXTERN PetscErrorCode MatPartitioningPTScotchGetImbalance(MatPartitioning,PetscReal*);
PETSC_EXTERN PetscErrorCode MatPartitioningPTScotchSetStrategy(MatPartitioning,MPPTScotchStrategyType);
PETSC_EXTERN PetscErrorCode MatPartitioningPTScotchGetStrategy(MatPartitioning,MPPTScotchStrategyType*);

/*
 * hierarchical partitioning
 */
PETSC_EXTERN PetscErrorCode MatPartitioningHierarchicalGetFineparts(MatPartitioning,IS*);
PETSC_EXTERN PetscErrorCode MatPartitioningHierarchicalGetCoarseparts(MatPartitioning,IS*);
PETSC_EXTERN PetscErrorCode MatPartitioningHierarchicalSetNcoarseparts(MatPartitioning,PetscInt);
PETSC_EXTERN PetscErrorCode MatPartitioningHierarchicalSetNfineparts(MatPartitioning, PetscInt);

PETSC_EXTERN PetscErrorCode MatMeshToVertexGraph(Mat,PetscInt,Mat*);
PETSC_EXTERN PetscErrorCode MatMeshToCellGraph(Mat,PetscInt,Mat*);

/*
    If you add entries here you must also add them to src/mat/f90-mod/petscmat.h
    If any of the enum values are changed, also update dMatOps dict at src/binding/petsc4py/src/libpetsc4py/libpetsc4py.pyx
*/
typedef enum { MATOP_SET_VALUES=0,
               MATOP_GET_ROW=1,
               MATOP_RESTORE_ROW=2,
               MATOP_MULT=3,
               MATOP_MULT_ADD=4,
               MATOP_MULT_TRANSPOSE=5,
               MATOP_MULT_TRANSPOSE_ADD=6,
               MATOP_SOLVE=7,
               MATOP_SOLVE_ADD=8,
               MATOP_SOLVE_TRANSPOSE=9,
               MATOP_SOLVE_TRANSPOSE_ADD=10,
               MATOP_LUFACTOR=11,
               MATOP_CHOLESKYFACTOR=12,
               MATOP_SOR=13,
               MATOP_TRANSPOSE=14,
               MATOP_GETINFO=15,
               MATOP_EQUAL=16,
               MATOP_GET_DIAGONAL=17,
               MATOP_DIAGONAL_SCALE=18,
               MATOP_NORM=19,
               MATOP_ASSEMBLY_BEGIN=20,
               MATOP_ASSEMBLY_END=21,
               MATOP_SET_OPTION=22,
               MATOP_ZERO_ENTRIES=23,
               MATOP_ZERO_ROWS=24,
               MATOP_LUFACTOR_SYMBOLIC=25,
               MATOP_LUFACTOR_NUMERIC=26,
               MATOP_CHOLESKY_FACTOR_SYMBOLIC=27,
               MATOP_CHOLESKY_FACTOR_NUMERIC=28,
               MATOP_SETUP=29,
               MATOP_ILUFACTOR_SYMBOLIC=30,
               MATOP_ICCFACTOR_SYMBOLIC=31,
               MATOP_GET_DIAGONAL_BLOCK=32,
               MATOP_SET_INF=33,
               MATOP_DUPLICATE=34,
               MATOP_FORWARD_SOLVE=35,
               MATOP_BACKWARD_SOLVE=36,
               MATOP_ILUFACTOR=37,
               MATOP_ICCFACTOR=38,
               MATOP_AXPY=39,
               MATOP_CREATE_SUBMATRICES=40,
               MATOP_INCREASE_OVERLAP=41,
               MATOP_GET_VALUES=42,
               MATOP_COPY=43,
               MATOP_GET_ROW_MAX=44,
               MATOP_SCALE=45,
               MATOP_SHIFT=46,
               MATOP_DIAGONAL_SET=47,
               MATOP_ZERO_ROWS_COLUMNS=48,
               MATOP_SET_RANDOM=49,
               MATOP_GET_ROW_IJ=50,
               MATOP_RESTORE_ROW_IJ=51,
               MATOP_GET_COLUMN_IJ=52,
               MATOP_RESTORE_COLUMN_IJ=53,
               MATOP_FDCOLORING_CREATE=54,
               MATOP_COLORING_PATCH=55,
               MATOP_SET_UNFACTORED=56,
               MATOP_PERMUTE=57,
               MATOP_SET_VALUES_BLOCKED=58,
               MATOP_CREATE_SUBMATRIX=59,
               MATOP_DESTROY=60,
               MATOP_VIEW=61,
               MATOP_CONVERT_FROM=62,
               /* MATOP_PLACEHOLDER_63=63 */
               MATOP_MATMAT_MULT_SYMBOLIC=64,
               MATOP_MATMAT_MULT_NUMERIC=65,
               MATOP_SET_LOCAL_TO_GLOBAL_MAP=66,
               MATOP_SET_VALUES_LOCAL=67,
               MATOP_ZERO_ROWS_LOCAL=68,
               MATOP_GET_ROW_MAX_ABS=69,
               MATOP_GET_ROW_MIN_ABS=70,
               MATOP_CONVERT=71,
               MATOP_HAS_OPERATION=72,
               /* MATOP_PLACEHOLDER_73=73, */
               MATOP_SET_VALUES_ADIFOR=74,
               MATOP_FD_COLORING_APPLY=75,
               MATOP_SET_FROM_OPTIONS=76,
               /* MATOP_PLACEHOLDER_77=77, */
               /* MATOP_PLACEHOLDER_78=78, */
               MATOP_FIND_ZERO_DIAGONALS=79,
               MATOP_MULT_MULTIPLE=80,
               MATOP_SOLVE_MULTIPLE=81,
               MATOP_GET_INERTIA=82,
               MATOP_LOAD=83,
               MATOP_IS_SYMMETRIC=84,
               MATOP_IS_HERMITIAN=85,
               MATOP_IS_STRUCTURALLY_SYMMETRIC=86,
               MATOP_SET_VALUES_BLOCKEDLOCAL=87,
               MATOP_CREATE_VECS=88,
               /* MATOP_PLACEHOLDER_89=89, */
               MATOP_MAT_MULT_SYMBOLIC=90,
               MATOP_MAT_MULT_NUMERIC=91,
               /* MATOP_PLACEHOLDER_92=92, */
               MATOP_PTAP_SYMBOLIC=93,
               MATOP_PTAP_NUMERIC=94,
               /* MATOP_PLACEHOLDER_95=95, */
               MATOP_MAT_TRANSPOSE_MULT_SYMBO=96,
               MATOP_MAT_TRANSPOSE_MULT_NUMER=97,
               MATOP_BIND_TO_CPU=98,
               MATOP_PRODUCTSETFROMOPTIONS=99,
               MATOP_PRODUCTSYMBOLIC=100,
               MATOP_PRODUCTNUMERIC=101,
               MATOP_CONJUGATE=102,
               MATOP_VIEW_NATIVE=103,
               MATOP_SET_VALUES_ROW=104,
               MATOP_REAL_PART=105,
               MATOP_IMAGINARY_PART=106,
               MATOP_GET_ROW_UPPER_TRIANGULAR=107,
               MATOP_RESTORE_ROW_UPPER_TRIANG=108,
               MATOP_MAT_SOLVE=109,
               MATOP_MAT_SOLVE_TRANSPOSE=110,
               MATOP_GET_ROW_MIN=111,
               MATOP_GET_COLUMN_VECTOR=112,
               MATOP_MISSING_DIAGONAL=113,
               MATOP_GET_SEQ_NONZERO_STRUCTUR=114,
               MATOP_CREATE=115,
               MATOP_GET_GHOSTS=116,
               MATOP_GET_LOCAL_SUB_MATRIX=117,
               MATOP_RESTORE_LOCALSUB_MATRIX=118,
               MATOP_MULT_DIAGONAL_BLOCK=119,
               MATOP_HERMITIAN_TRANSPOSE=120,
               MATOP_MULT_HERMITIAN_TRANSPOSE=121,
               MATOP_MULT_HERMITIAN_TRANS_ADD=122,
               MATOP_GET_MULTI_PROC_BLOCK=123,
               MATOP_FIND_NONZERO_ROWS=124,
               MATOP_GET_COLUMN_NORMS=125,
               MATOP_INVERT_BLOCK_DIAGONAL=126,
               MATOP_INVERT_VBLOCK_DIAGONAL=127,
               MATOP_CREATE_SUB_MATRICES_MPI=128,
               MATOP_SET_VALUES_BATCH=129,
               /* MATOP_PLACEHOLDER_130=130, */
               MATOP_TRANSPOSE_MAT_MULT_SYMBO=131,
               MATOP_TRANSPOSE_MAT_MULT_NUMER=132,
               MATOP_TRANSPOSE_COLORING_CREAT=133,
               MATOP_TRANS_COLORING_APPLY_SPT=134,
               MATOP_TRANS_COLORING_APPLY_DEN=135,
               /* MATOP_PLACEHOLDER_136=136, */
               MATOP_RART_SYMBOLIC=137,
               MATOP_RART_NUMERIC=138,
               MATOP_SET_BLOCK_SIZES=139,
               MATOP_AYPX=140,
               MATOP_RESIDUAL=141,
               MATOP_FDCOLORING_SETUP=142,
               MATOP_FIND_OFFBLOCK_ENTRIES=143,
               MATOP_MPICONCATENATESEQ=144,
               MATOP_DESTROYSUBMATRICES=145,
               MATOP_TRANSPOSE_SOLVE=146,
               MATOP_GET_VALUES_LOCAL=147
             } MatOperation;
PETSC_EXTERN PetscErrorCode MatSetOperation(Mat,MatOperation,void(*)(void));
PETSC_EXTERN PetscErrorCode MatGetOperation(Mat,MatOperation,void(**)(void));
PETSC_EXTERN PetscErrorCode MatHasOperation(Mat,MatOperation,PetscBool*);
PETSC_EXTERN PetscErrorCode MatHasCongruentLayouts(Mat,PetscBool*);
PETSC_DEPRECATED_FUNCTION("Use MatProductClear() (since version 3.14)") static inline PetscErrorCode MatFreeIntermediateDataStructures(Mat A) {return MatProductClear(A);}
PETSC_EXTERN PetscErrorCode MatShellSetOperation(Mat,MatOperation,void(*)(void));
PETSC_EXTERN PetscErrorCode MatShellGetOperation(Mat,MatOperation,void(**)(void));
PETSC_EXTERN PetscErrorCode MatShellSetContext(Mat,void*);
PETSC_EXTERN PetscErrorCode MatShellSetVecType(Mat,VecType);
PETSC_EXTERN PetscErrorCode MatShellTestMult(Mat,PetscErrorCode (*)(void*,Vec,Vec),Vec,void*,PetscBool*);
PETSC_EXTERN PetscErrorCode MatShellTestMultTranspose(Mat,PetscErrorCode (*)(void*,Vec,Vec),Vec,void*,PetscBool*);
PETSC_EXTERN PetscErrorCode MatShellSetManageScalingShifts(Mat);
PETSC_EXTERN PetscErrorCode MatShellSetMatProductOperation(Mat,MatProductType,PetscErrorCode (*)(Mat,Mat,Mat,void**),PetscErrorCode (*)(Mat,Mat,Mat,void*),PetscErrorCode (*)(void*),MatType,MatType);
PETSC_EXTERN PetscErrorCode MatIsShell(Mat,PetscBool*);

/*
   Codes for matrices stored on disk. By default they are
   stored in a universal format. By changing the format with
   PetscViewerPushFormat(viewer,PETSC_VIEWER_NATIVE); the matrices will
   be stored in a way natural for the matrix, for example dense matrices
   would be stored as dense. Matrices stored this way may only be
   read into matrices of the same type.
*/
#define MATRIX_BINARY_FORMAT_DENSE -1

PETSC_EXTERN PetscErrorCode MatMPIBAIJSetHashTableFactor(Mat,PetscReal);

PETSC_EXTERN PetscErrorCode MatISSetLocalMatType(Mat,MatType);
PETSC_EXTERN PetscErrorCode MatISSetPreallocation(Mat,PetscInt,const PetscInt[],PetscInt,const PetscInt[]);
PETSC_EXTERN PetscErrorCode MatISStoreL2L(Mat,PetscBool);
PETSC_EXTERN PetscErrorCode MatISFixLocalEmpty(Mat,PetscBool);
PETSC_EXTERN PetscErrorCode MatISGetLocalMat(Mat,Mat*);
PETSC_EXTERN PetscErrorCode MatISRestoreLocalMat(Mat,Mat*);
PETSC_EXTERN PetscErrorCode MatISSetLocalMat(Mat,Mat);
PETSC_EXTERN PetscErrorCode MatISGetLocalToGlobalMapping(Mat,ISLocalToGlobalMapping*,ISLocalToGlobalMapping*);
PETSC_EXTERN PETSC_DEPRECATED_FUNCTION("Use the MatConvert() interface (since version 3.10)") PetscErrorCode MatISGetMPIXAIJ(Mat,MatReuse,Mat*);

/*S
     MatNullSpace - Object that removes a null space from a vector, i.e.
         orthogonalizes the vector to a subspace

   Level: advanced

.seealso: `MatNullSpaceCreate()`
S*/
typedef struct _p_MatNullSpace* MatNullSpace;

PETSC_EXTERN PetscErrorCode MatNullSpaceCreate(MPI_Comm,PetscBool ,PetscInt,const Vec[],MatNullSpace*);
PETSC_EXTERN PetscErrorCode MatNullSpaceSetFunction(MatNullSpace,PetscErrorCode (*)(MatNullSpace,Vec,void*),void*);
PETSC_EXTERN PetscErrorCode MatNullSpaceDestroy(MatNullSpace*);
PETSC_EXTERN PetscErrorCode MatNullSpaceRemove(MatNullSpace,Vec);
PETSC_EXTERN PetscErrorCode MatGetNullSpace(Mat, MatNullSpace *);
PETSC_EXTERN PetscErrorCode MatGetTransposeNullSpace(Mat, MatNullSpace *);
PETSC_EXTERN PetscErrorCode MatSetTransposeNullSpace(Mat,MatNullSpace);
PETSC_EXTERN PetscErrorCode MatSetNullSpace(Mat,MatNullSpace);
PETSC_EXTERN PetscErrorCode MatSetNearNullSpace(Mat,MatNullSpace);
PETSC_EXTERN PetscErrorCode MatGetNearNullSpace(Mat,MatNullSpace*);
PETSC_EXTERN PetscErrorCode MatNullSpaceTest(MatNullSpace,Mat,PetscBool  *);
PETSC_EXTERN PetscErrorCode MatNullSpaceView(MatNullSpace,PetscViewer);
PETSC_EXTERN PetscErrorCode MatNullSpaceGetVecs(MatNullSpace,PetscBool*,PetscInt*,const Vec**);
PETSC_EXTERN PetscErrorCode MatNullSpaceCreateRigidBody(Vec,MatNullSpace*);

PETSC_EXTERN PetscErrorCode MatReorderingSeqSBAIJ(Mat,IS);
PETSC_EXTERN PetscErrorCode MatMPISBAIJSetHashTableFactor(Mat,PetscReal);
PETSC_EXTERN PetscErrorCode MatSeqSBAIJSetColumnIndices(Mat,PetscInt *);

PETSC_EXTERN PetscErrorCode MatCreateMAIJ(Mat,PetscInt,Mat*);
PETSC_EXTERN PetscErrorCode MatMAIJRedimension(Mat,PetscInt,Mat*);
PETSC_EXTERN PetscErrorCode MatMAIJGetAIJ(Mat,Mat*);

PETSC_EXTERN PetscErrorCode MatComputeOperator(Mat,MatType,Mat*);
PETSC_EXTERN PetscErrorCode MatComputeOperatorTranspose(Mat,MatType,Mat*);

PETSC_DEPRECATED_FUNCTION("Use MatComputeOperator() (since version 3.12)") static inline PetscErrorCode MatComputeExplicitOperator(Mat A,Mat* B) { return MatComputeOperator(A,NULL,B); }
PETSC_DEPRECATED_FUNCTION("Use MatComputeOperatorTranspose() (since version 3.12)") static inline PetscErrorCode MatComputeExplicitOperatorTranspose(Mat A,Mat* B) { return MatComputeOperatorTranspose(A,NULL,B); }

PETSC_EXTERN PetscErrorCode MatCreateKAIJ(Mat,PetscInt,PetscInt,const PetscScalar[],const PetscScalar[],Mat*);
PETSC_EXTERN PetscErrorCode MatKAIJGetAIJ(Mat,Mat*);
PETSC_EXTERN PetscErrorCode MatKAIJGetS(Mat,PetscInt*,PetscInt*,PetscScalar**);
PETSC_EXTERN PetscErrorCode MatKAIJGetSRead(Mat,PetscInt*,PetscInt*,const PetscScalar**);
PETSC_EXTERN PetscErrorCode MatKAIJRestoreS(Mat,PetscScalar**);
PETSC_EXTERN PetscErrorCode MatKAIJRestoreSRead(Mat,const PetscScalar**);
PETSC_EXTERN PetscErrorCode MatKAIJGetT(Mat,PetscInt*,PetscInt*,PetscScalar**);
PETSC_EXTERN PetscErrorCode MatKAIJGetTRead(Mat,PetscInt*,PetscInt*,const PetscScalar**);
PETSC_EXTERN PetscErrorCode MatKAIJRestoreT(Mat,PetscScalar**);
PETSC_EXTERN PetscErrorCode MatKAIJRestoreTRead(Mat,const PetscScalar**);
PETSC_EXTERN PetscErrorCode MatKAIJSetAIJ(Mat,Mat);
PETSC_EXTERN PetscErrorCode MatKAIJSetS(Mat,PetscInt,PetscInt,const PetscScalar[]);
PETSC_EXTERN PetscErrorCode MatKAIJSetT(Mat,PetscInt,PetscInt,const PetscScalar[]);
PETSC_EXTERN PetscErrorCode MatKAIJGetScaledIdentity(Mat,PetscBool*);

PETSC_EXTERN PetscErrorCode MatDiagonalScaleLocal(Mat,Vec);

PETSC_EXTERN PetscErrorCode MatCreateMFFD(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,Mat*);
PETSC_EXTERN PetscErrorCode MatMFFDSetBase(Mat,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatMFFDSetFunction(Mat,PetscErrorCode(*)(void*,Vec,Vec),void*);
PETSC_EXTERN PetscErrorCode MatMFFDSetFunctioni(Mat,PetscErrorCode (*)(void*,PetscInt,Vec,PetscScalar*));
PETSC_EXTERN PetscErrorCode MatMFFDSetFunctioniBase(Mat,PetscErrorCode (*)(void*,Vec));
PETSC_EXTERN PetscErrorCode MatMFFDSetHHistory(Mat,PetscScalar[],PetscInt);
PETSC_EXTERN PetscErrorCode MatMFFDResetHHistory(Mat);
PETSC_EXTERN PetscErrorCode MatMFFDSetFunctionError(Mat,PetscReal);
PETSC_EXTERN PetscErrorCode MatMFFDSetPeriod(Mat,PetscInt);
PETSC_EXTERN PetscErrorCode MatMFFDGetH(Mat,PetscScalar *);
PETSC_EXTERN PetscErrorCode MatMFFDSetOptionsPrefix(Mat,const char[]);
PETSC_EXTERN PetscErrorCode MatMFFDCheckPositivity(void*,Vec,Vec,PetscScalar*);
PETSC_EXTERN PetscErrorCode MatMFFDSetCheckh(Mat,PetscErrorCode (*)(void*,Vec,Vec,PetscScalar*),void*);

/*S
    MatMFFD - A data structured used to manage the computation of the h differencing parameter for matrix-free
              Jacobian vector products

    Notes:
    MATMFFD is a specific MatType which uses the MatMFFD data structure

           MatMFFD*() methods actually take the Mat as their first argument. Not a MatMFFD data structure

    Level: developer

.seealso: `MATMFFD`, `MatCreateMFFD()`, `MatMFFDSetFuction()`, `MatMFFDSetType()`, `MatMFFDRegister()`
S*/
typedef struct _p_MatMFFD* MatMFFD;

/*J
    MatMFFDType - algorithm used to compute the h used in computing matrix-vector products via differencing of the function

   Level: beginner

.seealso: `MatMFFDSetType()`, `MatMFFDRegister()`
J*/
typedef const char* MatMFFDType;
#define MATMFFD_DS  "ds"
#define MATMFFD_WP  "wp"

PETSC_EXTERN PetscErrorCode MatMFFDSetType(Mat,MatMFFDType);
PETSC_EXTERN PetscErrorCode MatMFFDRegister(const char[],PetscErrorCode (*)(MatMFFD));

PETSC_EXTERN PetscErrorCode MatMFFDDSSetUmin(Mat,PetscReal);
PETSC_EXTERN PetscErrorCode MatMFFDWPSetComputeNormU(Mat,PetscBool);

PETSC_EXTERN PetscErrorCode MatFDColoringSetType(MatFDColoring,MatMFFDType);

PETSC_EXTERN PetscErrorCode PetscViewerMathematicaPutMatrix(PetscViewer, PetscInt, PetscInt, PetscReal *);
PETSC_EXTERN PetscErrorCode PetscViewerMathematicaPutCSRMatrix(PetscViewer, PetscInt, PetscInt, PetscInt *, PetscInt *, PetscReal *);

#ifdef PETSC_HAVE_H2OPUS
PETSC_EXTERN_TYPEDEF typedef PetscScalar (*MatH2OpusKernel)(PetscInt,PetscReal[],PetscReal[],void*);
PETSC_EXTERN PetscErrorCode MatCreateH2OpusFromKernel(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,const PetscReal[],PetscBool,MatH2OpusKernel,void*,PetscReal,PetscInt,PetscInt,Mat*);
PETSC_EXTERN PetscErrorCode MatCreateH2OpusFromMat(Mat,PetscInt,const PetscReal[],PetscBool,PetscReal,PetscInt,PetscInt,PetscInt,PetscReal,Mat*);
PETSC_EXTERN PetscErrorCode MatH2OpusSetSamplingMat(Mat,Mat,PetscInt,PetscReal);
PETSC_EXTERN PetscErrorCode MatH2OpusOrthogonalize(Mat);
PETSC_EXTERN PetscErrorCode MatH2OpusCompress(Mat,PetscReal);
PETSC_EXTERN PetscErrorCode MatH2OpusSetNativeMult(Mat,PetscBool);
PETSC_EXTERN PetscErrorCode MatH2OpusGetNativeMult(Mat,PetscBool*);
PETSC_EXTERN PetscErrorCode MatH2OpusGetIndexMap(Mat,IS*);
PETSC_EXTERN PetscErrorCode MatH2OpusMapVec(Mat,PetscBool,Vec,Vec*);
PETSC_EXTERN PetscErrorCode MatH2OpusLowRankUpdate(Mat,Mat,Mat,PetscScalar);
#endif

#ifdef PETSC_HAVE_HTOOL
PETSC_EXTERN_TYPEDEF typedef PetscErrorCode (*MatHtoolKernel)(PetscInt,PetscInt,PetscInt,const PetscInt*,const PetscInt*,PetscScalar*,void*);
PETSC_EXTERN PetscErrorCode MatCreateHtoolFromKernel(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,const PetscReal[],const PetscReal[],MatHtoolKernel,void*,Mat*);
PETSC_EXTERN PetscErrorCode MatHtoolSetKernel(Mat,MatHtoolKernel,void*);
PETSC_EXTERN PetscErrorCode MatHtoolGetPermutationSource(Mat,IS*);
PETSC_EXTERN PetscErrorCode MatHtoolGetPermutationTarget(Mat,IS*);
PETSC_EXTERN PetscErrorCode MatHtoolUsePermutation(Mat,PetscBool);
/*E
     MatHtoolCompressorType - Indicates the type of compressor used by a MATHTOOL

   Level: beginner

    Values:
+   MAT_HTOOL_COMPRESSOR_SYMPARTIAL_ACA (default) - symmetric partial adaptive cross approximation
.   MAT_HTOOL_COMPRESSOR_FULL_ACA - full adaptive cross approximation
-   MAT_HTOOL_COMPRESSOR_SVD - singular value decomposition

.seealso: `MatCreateHtoolFromKernel()`, `MATHTOOL`, `MatHtoolClusteringType`
E*/
typedef enum { MAT_HTOOL_COMPRESSOR_SYMPARTIAL_ACA, MAT_HTOOL_COMPRESSOR_FULL_ACA, MAT_HTOOL_COMPRESSOR_SVD } MatHtoolCompressorType;
/*E
     MatHtoolClusteringType - Indicates the type of clustering used by a MATHTOOL

   Level: beginner

    Values:
+   MAT_HTOOL_CLUSTERING_PCA_REGULAR (default) - axis computed via principle component analysis, split uniformly
.   MAT_HTOOL_CLUSTERING_PCA_GEOMETRIC - axis computed via principle component analysis, split barycentrically
.   MAT_HTOOL_CLUSTERING_BOUNDING_BOX_1_REGULAR - axis along the largest extent of the bounding box, split uniformly
-   MAT_HTOOL_CLUSTERING_BOUNDING_BOX_1_GEOMETRIC - axis along the largest extent of the bounding box, split barycentrically

    Notes: higher-dimensional clustering is not yet supported in Htool, but once it is, one should add BOUNDING_BOX_{2,3} types

.seealso: `MatCreateHtoolFromKernel()`, `MATHTOOL`, `MatHtoolCompressorType`
E*/
typedef enum { MAT_HTOOL_CLUSTERING_PCA_REGULAR, MAT_HTOOL_CLUSTERING_PCA_GEOMETRIC, MAT_HTOOL_CLUSTERING_BOUNDING_BOX_1_REGULAR, MAT_HTOOL_CLUSTERING_BOUNDING_BOX_1_GEOMETRIC } MatHtoolClusteringType;
#endif

/*
   PETSc interface to MUMPS
*/
#ifdef PETSC_HAVE_MUMPS
PETSC_EXTERN PetscErrorCode MatMumpsSetIcntl(Mat,PetscInt,PetscInt);
PETSC_EXTERN PetscErrorCode MatMumpsGetIcntl(Mat,PetscInt,PetscInt*);
PETSC_EXTERN PetscErrorCode MatMumpsSetCntl(Mat,PetscInt,PetscReal);
PETSC_EXTERN PetscErrorCode MatMumpsGetCntl(Mat,PetscInt,PetscReal*);

PETSC_EXTERN PetscErrorCode MatMumpsGetInfo(Mat,PetscInt,PetscInt*);
PETSC_EXTERN PetscErrorCode MatMumpsGetInfog(Mat,PetscInt,PetscInt*);
PETSC_EXTERN PetscErrorCode MatMumpsGetRinfo(Mat,PetscInt,PetscReal*);
PETSC_EXTERN PetscErrorCode MatMumpsGetRinfog(Mat,PetscInt,PetscReal*);
PETSC_EXTERN PetscErrorCode MatMumpsGetInverse(Mat,Mat);
PETSC_EXTERN PetscErrorCode MatMumpsGetInverseTranspose(Mat,Mat);
#endif

/*
   PETSc interface to Mkl_Pardiso
*/
#ifdef PETSC_HAVE_MKL_PARDISO
PETSC_EXTERN PetscErrorCode MatMkl_PardisoSetCntl(Mat,PetscInt,PetscInt);
#endif

/*
   PETSc interface to Mkl_CPardiso
*/
#ifdef PETSC_HAVE_MKL_CPARDISO
PETSC_EXTERN PetscErrorCode MatMkl_CPardisoSetCntl(Mat,PetscInt,PetscInt);
#endif

/*
   PETSc interface to SUPERLU
*/
#ifdef PETSC_HAVE_SUPERLU
PETSC_EXTERN PetscErrorCode MatSuperluSetILUDropTol(Mat,PetscReal);
#endif

/*
   PETSc interface to SUPERLU_DIST
*/
#ifdef PETSC_HAVE_SUPERLU_DIST
PETSC_EXTERN PetscErrorCode MatSuperluDistGetDiagU(Mat,PetscScalar*);
#endif

/*
   PETSc interface to STRUMPACK
*/
#ifdef PETSC_HAVE_STRUMPACK
/*E
    MatSTRUMPACKReordering - sparsity reducing ordering to be used in STRUMPACK

    Level: intermediate
E*/
typedef enum {MAT_STRUMPACK_NATURAL=0,
              MAT_STRUMPACK_METIS=1,
              MAT_STRUMPACK_PARMETIS=2,
              MAT_STRUMPACK_SCOTCH=3,
              MAT_STRUMPACK_PTSCOTCH=4,
              MAT_STRUMPACK_RCM=5} MatSTRUMPACKReordering;
PETSC_EXTERN PetscErrorCode MatSTRUMPACKSetReordering(Mat,MatSTRUMPACKReordering);
PETSC_EXTERN PetscErrorCode MatSTRUMPACKSetColPerm(Mat,PetscBool);
PETSC_EXTERN PetscErrorCode MatSTRUMPACKSetHSSRelTol(Mat,PetscReal);
PETSC_DEPRECATED_FUNCTION("Use MatSTRUMPACKSetHSSRelTol() (since version 3.9)") static inline PetscErrorCode MatSTRUMPACKSetHSSRelCompTol(Mat mat,PetscReal rtol) {return MatSTRUMPACKSetHSSRelTol(mat,rtol);}
PETSC_EXTERN PetscErrorCode MatSTRUMPACKSetHSSAbsTol(Mat,PetscReal);
PETSC_EXTERN PetscErrorCode MatSTRUMPACKSetHSSMinSepSize(Mat,PetscInt);
PETSC_DEPRECATED_FUNCTION("Use MatSTRUMPACKSetHSSMinSepSize() (since version 3.9)") static inline PetscErrorCode MatSTRUMPACKSetHSSMinSize(Mat mat,PetscInt hssminsize) {return MatSTRUMPACKSetHSSMinSepSize(mat,hssminsize);}
PETSC_EXTERN PetscErrorCode MatSTRUMPACKSetHSSMaxRank(Mat,PetscInt);
PETSC_EXTERN PetscErrorCode MatSTRUMPACKSetHSSLeafSize(Mat,PetscInt);
#endif

PETSC_EXTERN PetscErrorCode MatBindToCPU(Mat,PetscBool);
PETSC_EXTERN PetscErrorCode MatBoundToCPU(Mat,PetscBool*);
PETSC_DEPRECATED_FUNCTION("Use MatBindToCPU (since v3.13)") static inline PetscErrorCode MatPinToCPU(Mat A,PetscBool flg) {return MatBindToCPU(A,flg);}
PETSC_EXTERN PetscErrorCode MatSetBindingPropagates(Mat,PetscBool);
PETSC_EXTERN PetscErrorCode MatGetBindingPropagates(Mat,PetscBool *);

typedef struct _n_SplitCSRMat *PetscSplitCSRDataStructure;
PETSC_EXTERN PetscErrorCode MatCUSPARSEGetDeviceMatWrite(Mat,PetscSplitCSRDataStructure*);

#ifdef PETSC_HAVE_KOKKOS_KERNELS
PETSC_EXTERN PetscErrorCode MatKokkosGetDeviceMatWrite(Mat,PetscSplitCSRDataStructure*);
PETSC_EXTERN PetscErrorCode MatSeqAIJKokkosSetDeviceMat(Mat,PetscSplitCSRDataStructure);
PETSC_EXTERN PetscErrorCode MatSeqAIJKokkosGetDeviceMat(Mat,PetscSplitCSRDataStructure*);
#endif

#ifdef PETSC_HAVE_CUDA
/*E
    MatCUSPARSEStorageFormat - indicates the storage format for CUSPARSE (GPU)
    matrices.

    Not Collective

+   MAT_CUSPARSE_CSR - Compressed Sparse Row
.   MAT_CUSPARSE_ELL - Ellpack (requires CUDA 4.2 or later).
-   MAT_CUSPARSE_HYB - Hybrid, a combination of Ellpack and Coordinate format (requires CUDA 4.2 or later).

    Level: intermediate

   Any additions/changes here MUST also be made in include/petsc/finclude/petscmat.h

.seealso: `MatCUSPARSESetFormat()`, `MatCUSPARSEFormatOperation`
E*/

typedef enum {MAT_CUSPARSE_CSR, MAT_CUSPARSE_ELL, MAT_CUSPARSE_HYB} MatCUSPARSEStorageFormat;

/* these will be strings associated with enumerated type defined above */
PETSC_EXTERN const char *const MatCUSPARSEStorageFormats[];

/*E
    MatCUSPARSEFormatOperation - indicates the operation of CUSPARSE (GPU)
    matrices whose operation should use a particular storage format.

    Not Collective

+   MAT_CUSPARSE_MULT_DIAG - sets the storage format for the diagonal matrix in the parallel MatMult
.   MAT_CUSPARSE_MULT_OFFDIAG - sets the storage format for the offdiagonal matrix in the parallel MatMult
.   MAT_CUSPARSE_MULT - sets the storage format for the entire matrix in the serial (single GPU) MatMult
-   MAT_CUSPARSE_ALL - sets the storage format for all CUSPARSE (GPU) matrices

    Level: intermediate

.seealso: `MatCUSPARSESetFormat()`, `MatCUSPARSEStorageFormat`
E*/
typedef enum {MAT_CUSPARSE_MULT_DIAG, MAT_CUSPARSE_MULT_OFFDIAG, MAT_CUSPARSE_MULT, MAT_CUSPARSE_ALL} MatCUSPARSEFormatOperation;

PETSC_EXTERN PetscErrorCode MatCreateSeqAIJCUSPARSE(MPI_Comm,PetscInt,PetscInt,PetscInt,const PetscInt[],Mat*);
PETSC_EXTERN PetscErrorCode MatCreateAIJCUSPARSE(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,const PetscInt[],PetscInt,const PetscInt[],Mat*);
PETSC_EXTERN PetscErrorCode MatCUSPARSESetFormat(Mat,MatCUSPARSEFormatOperation,MatCUSPARSEStorageFormat);
PETSC_EXTERN PetscErrorCode MatCUSPARSESetUseCPUSolve(Mat,PetscBool);
typedef struct Mat_SeqAIJCUSPARSETriFactors* Mat_SeqAIJCUSPARSETriFactors_p;
PETSC_EXTERN PetscErrorCode MatSeqAIJCUSPARSEGetIJ(Mat,PetscBool,const int**,const int**);
PETSC_EXTERN PetscErrorCode MatSeqAIJCUSPARSERestoreIJ(Mat,PetscBool,const int**,const int**);
PETSC_EXTERN PetscErrorCode MatSeqAIJCUSPARSEGetArrayRead(Mat,const PetscScalar**);
PETSC_EXTERN PetscErrorCode MatSeqAIJCUSPARSERestoreArrayRead(Mat,const PetscScalar**);
PETSC_EXTERN PetscErrorCode MatSeqAIJCUSPARSEGetArrayWrite(Mat,PetscScalar**);
PETSC_EXTERN PetscErrorCode MatSeqAIJCUSPARSERestoreArrayWrite(Mat,PetscScalar**);
PETSC_EXTERN PetscErrorCode MatSeqAIJCUSPARSEGetArray(Mat,PetscScalar**);
PETSC_EXTERN PetscErrorCode MatSeqAIJCUSPARSERestoreArray(Mat,PetscScalar**);

PETSC_EXTERN PetscErrorCode MatCreateDenseCUDA(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,PetscScalar[],Mat*);
PETSC_EXTERN PetscErrorCode MatCreateSeqDenseCUDA(MPI_Comm,PetscInt,PetscInt,PetscScalar[],Mat*);
PETSC_EXTERN PetscErrorCode MatMPIDenseCUDASetPreallocation(Mat,PetscScalar[]);
PETSC_EXTERN PetscErrorCode MatSeqDenseCUDASetPreallocation(Mat,PetscScalar[]);
PETSC_EXTERN PetscErrorCode MatDenseCUDAGetArrayWrite(Mat,PetscScalar**);
PETSC_EXTERN PetscErrorCode MatDenseCUDAGetArrayRead(Mat,const PetscScalar**);
PETSC_EXTERN PetscErrorCode MatDenseCUDAGetArray(Mat,PetscScalar**);
PETSC_EXTERN PetscErrorCode MatDenseCUDARestoreArrayWrite(Mat,PetscScalar**);
PETSC_EXTERN PetscErrorCode MatDenseCUDARestoreArrayRead(Mat,const PetscScalar**);
PETSC_EXTERN PetscErrorCode MatDenseCUDARestoreArray(Mat,PetscScalar**);
PETSC_EXTERN PetscErrorCode MatDenseCUDAPlaceArray(Mat,const PetscScalar*);
PETSC_EXTERN PetscErrorCode MatDenseCUDAReplaceArray(Mat,const PetscScalar*);
PETSC_EXTERN PetscErrorCode MatDenseCUDAResetArray(Mat);

#endif

#if defined(PETSC_HAVE_VIENNACL)
PETSC_EXTERN PetscErrorCode MatCreateSeqAIJViennaCL(MPI_Comm,PetscInt,PetscInt,PetscInt,const PetscInt[],Mat*);
PETSC_EXTERN PetscErrorCode MatCreateAIJViennaCL(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,const PetscInt[],PetscInt,const PetscInt[],Mat*);
#endif

/*
   PETSc interface to FFTW
*/
#if defined(PETSC_HAVE_FFTW)
PETSC_EXTERN PetscErrorCode VecScatterPetscToFFTW(Mat,Vec,Vec);
PETSC_EXTERN PetscErrorCode VecScatterFFTWToPetsc(Mat,Vec,Vec);
PETSC_EXTERN PetscErrorCode MatCreateVecsFFTW(Mat,Vec*,Vec*,Vec*);
#endif

#if defined(PETSC_HAVE_SCALAPACK)
PETSC_EXTERN PetscErrorCode MatCreateScaLAPACK(MPI_Comm,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,PetscInt,Mat*);
PETSC_EXTERN PetscErrorCode MatScaLAPACKSetBlockSizes(Mat,PetscInt,PetscInt);
PETSC_EXTERN PetscErrorCode MatScaLAPACKGetBlockSizes(Mat,PetscInt*,PetscInt*);
#endif

PETSC_EXTERN PetscErrorCode MatCreateNest(MPI_Comm,PetscInt,const IS[],PetscInt,const IS[],const Mat[],Mat*);
PETSC_EXTERN PetscErrorCode MatNestGetSize(Mat,PetscInt*,PetscInt*);
PETSC_EXTERN PetscErrorCode MatNestGetISs(Mat,IS[],IS[]);
PETSC_EXTERN PetscErrorCode MatNestGetLocalISs(Mat,IS[],IS[]);
PETSC_EXTERN PetscErrorCode MatNestGetSubMats(Mat,PetscInt*,PetscInt*,Mat***);
PETSC_EXTERN PetscErrorCode MatNestGetSubMat(Mat,PetscInt,PetscInt,Mat*);
PETSC_EXTERN PetscErrorCode MatNestSetVecType(Mat,VecType);
PETSC_EXTERN PetscErrorCode MatNestSetSubMats(Mat,PetscInt,const IS[],PetscInt,const IS[],const Mat[]);
PETSC_EXTERN PetscErrorCode MatNestSetSubMat(Mat,PetscInt,PetscInt,Mat);

PETSC_EXTERN PetscErrorCode MatChop(Mat,PetscReal);
PETSC_EXTERN PetscErrorCode MatComputeBandwidth(Mat,PetscReal,PetscInt*);

PETSC_EXTERN PetscErrorCode MatSubdomainsCreateCoalesce(Mat,PetscInt,PetscInt*,IS**);

PETSC_EXTERN PetscErrorCode MatPreallocatorPreallocate(Mat,PetscBool,Mat);

PETSC_INTERN PetscErrorCode MatHeaderMerge(Mat,Mat*);
PETSC_EXTERN PetscErrorCode MatHeaderReplace(Mat,Mat*);

PETSC_EXTERN PetscErrorCode MatSeqAIJGetCSRAndMemType(Mat,const PetscInt**,const PetscInt**,PetscScalar**,PetscMemType*);

PETSC_EXTERN PetscErrorCode MatCreateGraph(Mat,PetscBool,PetscBool,Mat*);
PETSC_EXTERN PetscErrorCode MatFilter(Mat,PetscReal,Mat*);

#endif