Merge branch 'tisaac/feature-lmvm-rework' into 'main'

MatLMVM rework

See merge request petsc/petsc!6401

MatLMVM: Complete rework of internals to use LMBasis and LMProducts

I don't think there is a good way to break this up into smaller commits: once I
use LMBasis and LMProducts in Mat_LMVM, all of the

MatLMVM: Complete rework of internals to use LMBasis and LMProducts

I don't think there is a good way to break this up into smaller commits: once I
use LMBasis and LMProducts in Mat_LMVM, all of the implementations that depend on
it are broken until they are changed to also use these new objects. It is probably
better to review all of the MatLMVM implementations (except for denseqn) as new code
rather than trying to review using a diff tool.

This rework achieves:

- Implementations of three classes of algorithms for limitd memory quasi-Newton updates
- MAT_LMVM_MULT_RECURSIVE: Recursive, level 1 BLAS algorithms that closely match
the typical way the methods are presented mathematically.
- MAT_LMVM_MULT_DENSE: level 2 BLAS algorithms that, when possible,
avoid any need for recomputation when the reference Jacobian J0 changes.
- MAT_LMVM_MULT_COMPACT_DENSE: level 2 BLAS algorithms that construct rank-m (or rank-2m)
update representations of the operators, for the best-performance on MatMult() and MatSolve(),
but at the cost of additional setup, and requiring more recomputation when J0 changes
than MAT_LMVM_MULT_DENSE
- Every quasi-Newton method has a dual method (e.g. BFGS and DFP): we exploit this duality
to use only one code path for a dual pair, reducing the numer of implementaitons to maintain
- Special handling of the case J0 = gamma * I, avoiding products that are unnecessary in this case
- Instead of including a MatLMVMDiagBrdn as the J0 matrix when J0 is
variable (which means that both B and J0 of basis vectors to maintain),
a SymBroydenRescale object is shared by MatLMVMDiagBrdn and other formats that use rescaling
- Improved correctness of when internal products need to be recomputed: if the user externally
changes J0, this will be detected

show more ...

Merge branch 'hsuh/dense-lmvm-squashed' into 'main'

Dense LMVM

See merge request petsc/petsc!7371

Dense LMVM - BFGS, DFP, QN implemented

Merge branch 'barry/2023-07-18/manual-linter-fixes-ksp' into 'main'

Manual fixes needed for linter for the KSP directory

See merge request petsc/petsc!6735

Manual fixes needed for linter for the KSP directory

Merge branch 'jacobf/2023-06-30/enable-doc-lint' into 'main'

Enable docs linting

See merge request petsc/petsc!6667

Lint apply: ksp

Merge remote-tracking branch 'origin/release'

Merge branch 'barry/2023-05-27/improve-tutorials/release' into 'release'

Minor cleanup of website tutorials

See merge request petsc/petsc!6520

change to consistent use of ch_xxx for chapter names in the docs, instead of a mix of ch_xx and chapter_xx

Merge branch 'stefanozampini/matlmvm' into 'main'

some optimizations for MATLMVM

See merge request petsc/petsc!6034

MATLMVM: Use MatCreateVecs

Remove errors for API that are not a getters
Fix man pages

Merge branch 'jacobf/2022-12-10/petscerrorcode-nodiscard' into 'main'

Feature: Non-discardable PetscErrorCode

See merge request petsc/petsc!5923

Make PetscErrorCode a non-discardable enum

Merge remote-tracking branch 'origin/release'

Merge branch 'barry/2022-09-29/fix-ksp-manpages' into 'release'

KSP manual page updates

See merge request petsc/petsc!5698

Update all the manual pages for KSPType

Fix a few additional manual pages and remove some dead comments from code

Commit-type: documentation
/spend 3h

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

Merge branch 'jacobf/2022-09-17/slimmer-petscobject' into 'main'

Feature: Slimmer PetscObject

See merge request petsc/petsc!5649

Remove parent, parentid, flops, time, mem, and memchildren. Deprecate PetscLogObjectParent(), PetscLogObjectMemory(), and PetscNewLog()

Merge branch 'jose/manual-mat' into 'main'

Users manual: fixes for Mat section

See merge request petsc/petsc!5573

Remove reference to non-existing option -mat_lmvm_num_vecs

Merge branch 'jolivet/fix-style-one-liners' into 'main'

Remove braces from one-liners w/o PetscCall()

See merge request petsc/petsc!5561