Merge remote-tracking branch 'origin/release'

Merge branch 'mr/1863-mpiaij-coo' into 'release'

Consolidated bugfixes for issues #1860, #1863, #1864, #1865, #1866, #1867, #1868

See merge request petsc/petsc!9059

Mat: fix MPIAIJ COO reallocation copy/free bug (#1863)

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/cleanup-matconjugate' into 'main'

[Mat|Vec]Conjugate(): no need to check for USE_COMPLEX in implementations

See merge request petsc/petsc!8937

MatConjugate(): no need to check for USE_COMPLEX in implementations

Merge branch 'jolivet/fix-unnecessary-reduce' into 'main'

Mat: set appropriate NO_OFF_PROC_ENTRIES to bypass MPI_Allreduce()

See merge request petsc/petsc!8872

Mat: set appropriate NO_OFF_PROC_ENTRIES to bypass MPI_Allreduce()

Merge branch 'jolivet/fix-nonscalable-matnorm' into 'main'

MatNorm: fix some non-scalable implementations for NORM_1

See merge request petsc/petsc!8862

VecSetValues() instead

MatNorm: fix some non-scalable implementations for NORM_1

Reported-by: Vincent Robert <vincent.robert@cea.fr>

Merge branch 'barry/2025-10-18/optimize-aij-ops' into 'main'

Refactor handling of diagonal marking in *AIJ and SELL matrices

See merge request petsc/petsc!8797

- Replace MatMissingDiagonal() and MatMarkDiagonals_SeqXXX() with MatGetDiagonalMarkers_SeqXXX()

- Mat_SeqXXX->diag is not automatically created during MatAssemblyEnd() saving memory and time

- Replace MatMissingDiagonal() and MatMarkDiagonals_SeqXXX() with MatGetDiagonalMarkers_SeqXXX()

- Mat_SeqXXX->diag is not automatically created during MatAssemblyEnd() saving memory and time

- Accessing Mat_SeqXXX->diag now requires the use of MatGetDiagonalMarkers_SeqXXX() except when the current values are known to be correct; for example during numerical factorizations and solves

- Mat_SeqXXX->diag is now never shared among matrices; hence the free_diag flag is gone. That was always a risky proposition since any of the owning matrices could chang the values thus making them incorrect for other owners.

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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

Updates to manual pages related to MatProductCreate()

Not for release

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 remote-tracking branch 'origin/release'

Merge branch 'jolivet/fix-arrays' into 'release'

Fix error in MatTransposeMatMultSymbolic() in case of empty rows

See merge request petsc/petsc!8773

Merge branch 'jczhang/2025-09-19/precision-mumps' into 'main'

Support different precisions with MUMPS

See merge request petsc/petsc!8715

Enable ScaLAPACK and MUMPS for other precisions

Merge remote-tracking branch 'origin/release'

Avoid extra allocation

Merge branch 'barry/2025-10-07/fix-matsetpreallocationcoo-mpiaij-bad-error-check/release' into 'release'

Fix illegal access of i1[n1 - 1] when n1 is zero.

See merge request petsc/petsc!8768

Fix illegal access of i1[n1 - 1] when n1 is zero.

Co-authored-by: Junchao Zhang <jczhang@mcs.anl.gov>