Merge branch 'tisaac/feature-mat-vectordiagonal' into 'main'

Add MATDIAGONAL and PCMatSetApplyOperation()

See merge request petsc/petsc!6487

Add `MATDIAGONAL` and `PCMatSetApplyOperation()`

`MATDIAGONAL` (`MatCreateDiagonal()`) is an interface for
manipulating a diagonal matrix as a `Vec`, in particular supporting
no-copy modification of

Add `MATDIAGONAL` and `PCMatSetApplyOperation()`

`MATDIAGONAL` (`MatCreateDiagonal()`) is an interface for
manipulating a diagonal matrix as a `Vec`, in particular supporting
no-copy modification of the diagonal and inverse diagonal via
`MatDiagonalGetDiagonal()`, `MatDiagonalRestoreDiagonal()`,
`MatDiagonalGetInverseDiagonal()`, and
`MatDiagonalRestoreInverseDiagonal`().

`PCMatSetApplyOperation()` and `PCMatGetApplyOperation()`
support using all the linear operators currently defined by a `Mat`
(`MatMult()`, `MatMultTranspose()`, `MatMultHermitianTranspose()`,
`MatSolve()`, `MatSolveTranspose()`) as the operation of `PCApply()`
for a `PCMAT`. The advantage over a `PCSHELL` is that the other
operations (`PCApplyTranspose()`, `PCMatApply()`) are automatically
inferred.

These tools help make it easier to route operations like
`VecPointwiseMult()` and `VecPointwiseDivide()` through
`KSPSolve()` to avoid handling diagonal matrices as a special
case (a pattern that is going to be removed from `MATLMVM`).

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Merge branch 'stefanozampini/h2opus-dmdakokkos' into 'main'

Add support for KOKKOS in H2OPUS

See merge request petsc/petsc!6408

Minor

Merge remote-tracking branch 'origin/release'

Merge branch 'jolivet/fix-Wzero-as-null-pointer-constant-ci' into 'release'

Fix -Wzero-as-null-pointer-constant

See merge request petsc/petsc!6294

Fix -Wzero-as-null-pointer-constant + El warnings

Merge branch 'jolivet/feature-hpddm-inertia-ci' into 'main'

PCHPDDM: add -pc_hpddm_levels_1_eps_use_inertia

See merge request petsc/petsc!5984

PCHPDDM: add PCHPDDMSetSTShareSubKSP()

Merge branch 'barry/2022-09-16/automatically-symmetrize-for-mis' into 'main'

Remove the -pc_gamg_symmetrize_graph option completely. Combine MatCreateGraph() and MatFilter().

See merge request pets

Merge branch 'barry/2022-09-16/automatically-symmetrize-for-mis' into 'main'

Remove the -pc_gamg_symmetrize_graph option completely. Combine MatCreateGraph() and MatFilter().

See merge request petsc/petsc!5644

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Minor fixes for working with GAMG, minor optimizations

Remove the -pc_gamg_symmetrize_graph option completely. Use symmetric state of matrix

Combine MatCreateGraph() and MatFilter().

Minor optimiz

Minor fixes for working with GAMG, minor optimizations

Remove the -pc_gamg_symmetrize_graph option completely. Use symmetric state of matrix

Combine MatCreateGraph() and MatFilter().

Minor optimizations of MatCreateGraph() when numerical values are not needed skip abs(entries) and dscale (for MIS and MISK)

Add PCGAMGCreateGraph() function

TODO: when using MIS and MISK only structural symmetry of matrix is needed, not actual symmetry

Commit-type: feature, housekeeping
/spend 2h

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Merge branch 'jacobf/2022-09-21/2-bike-2-shed' into 'main'

Feature: Bicycle Storage Facility 2

See merge request petsc/petsc!5661

source code format changes due to .clang-format changes

Transform all header-guards into ifndefs to make clang-format ignore them for preprocessor indentation

Merge branch 'barry/2022-08-21/clang-format-source' into 'main'

format repository with clang-format

See merge request petsc/petsc!5541

clang-format: convert PETSc sources to comply with clang-format

Merge branch 'adams/pcamgx' into 'main'

Add PC interface to AmgX

See merge request petsc/petsc!4323

Add PC interface to AmgX

https://developer.nvidia.com/amgx

Merge branch 'stefanozampini/objpython-gettype' into 'main'

petsc4py: implement getters for python type

See merge request petsc/petsc!5417

petsc4py: implement getters for python type

Merge branch 'main' into 'main'

PC: Add PCHYPREAMSSetInteriorNodes() to set interior nodes for HYPRE AMS

See merge request petsc/petsc!5426

PC: Add PCHYPREAMSSetInteriorNodes() to set interior nodes for HYPRE AMS

Merge branch 'adams/mataij-graph-filter' into 'main'

Move create and filter graph from PCGAMG to MATAIJ, add MIS-k

See merge request petsc/petsc!5331

added distance k MIS MatCoarsen type

Merge branch 'stefanozampini/gdsw-mg' into 'main'

Implement AGDSW coarse spaces for PCMG

See merge request petsc/petsc!5256