Merge branch 'pcfieldsplit_mr' into 'main'

Added `PCMatApply()` to `PCFIELDSPLIT` and `MatDenseScatter_Private()`

See merge request petsc/petsc!8986

MAT[HERMITIAN]TRANSPOSEVIRTUAL: fix double free with MatMatMult()

Merge branch 'barry/2026-01-13/ftn-generation-for-context-functions' into 'main'

Fortran generation of interface definitions for functions that take and return context variables (void *ctx and PetC

Merge branch 'barry/2026-01-13/ftn-generation-for-context-functions' into 'main'

Fortran generation of interface definitions for functions that take and return context variables (void *ctx and PetCtx ctx)

See merge request petsc/petsc!8956

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Add automatic generated fortran support for setting and returning contexts

Major cleanup of the code for setting and returning application (previously called user) contexts
- PetscCtx ctx is now t

Add automatic generated fortran support for setting and returning contexts

Major cleanup of the code for setting and returning application (previously called user) contexts
- PetscCtx ctx is now the standard for passing in contexts
- PetscCtxRt ctx is the standard for passing out contexts, including context destroy routines based on PetscCtxDestroyFn

Both of these are typedef to void*

Also removed most use of user and userctx for context arguments now consistently named ctx

Improved documentation on PetscCtx and PetscCtxRt and on how to use contexts (including getting them) from Fortran

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Merge branch 'jolivet/fix-matproduct-transposevirtual' into 'main'

MatTranspose: fix MatProduct with non-trivial scaling

See merge request petsc/petsc!8847

MatTranspose: fix MatProduct with non-trivial scaling

Reported-by: Jose E. Roman <jroman@dsic.upv.es>

Merge branch 'barry/2025-10-24/fix-dmshellsetdestroyctx' into 'main'

Finish converting the function prototypes of destroy for contexts to use PetscCtxDestroyFn

See merge request petsc/petsc!8810

Change names of Mat_XXX product contexts to MatProductCtx_XXX for code maintainability

Update destroy callback of all MatProductCtx and MatShellSetMatProductOperation() to use PetscCtxDestroyFn

Merge branch 'barry/2025-07-30/fix-matshellsetoperationarg' into 'main'

Complete usage of PetscVoidFn and PetscErrorCodeFn and introduce PetscFortranCallbackFn

See merge request petsc/petsc!8615

Change use of void (*)(void) and void (**)(void) in the PETSc API to PetscVoidFn * and PetscVoidFn ** or PetscErrorCodeFn * or PetscErrorCodeFn **

Merge branch 'stefanozampini/bs' into 'main'

PetscLayout: set default block size to 1

See merge request petsc/petsc!8226

PetscLayout: default block size 1

Merge branch 'jolivet/feature-matproduct_ab-hermitiantranspose' into 'main'

MATHERMITIANTRANSPOSEVIRTUAL: add basic support for MATPRODUCT_AB

See merge request petsc/petsc!7695

MATHERMITIANTRANSPOSEVIRTUAL: add basic support for MATPRODUCT_AB

Merge branch 'origin/release' with a revert of !7720

Merge branch 'jolivet/consolidate-error-checking-shell' into 'release'

MatShell and derivatives: bug fixing and code consolidation

See merge request petsc/petsc!7721

MatShellGetScalingShifts: consolidate checks for MatShell subtypes

Merge branch 'jolivet/fix-dense-factorization' into 'main'

Tweaking of when to call MatPropagateSymmetryOptions() or not

See merge request petsc/petsc!7701

MatPropagateSymmetryOptions in MatDuplicate and not always in
MatCreateSubMatrices

Merge remote-tracking branch 'origin/release'

Merge branch 'jolivet/minor-housekeeping' into 'release'

Some documentation and visibility fixes

See merge request petsc/petsc!7696

Some documentation and visibility fixes

Merge branch 'jose/matsolve-virtualtranspose' into 'main'

Mat: add support for MatSolve operations in MATTRANSPOSEVIRTUAL

See merge request petsc/petsc!7620

MATTRANSPOSEVIRTUAL: add operations that may be needed when doing MatSolve via the PC interface

Mat: add support for out-of-place MatSolve operations in MATTRANSPOSEVIRTUAL