Merge branch 'hsuh/taobrgn-type-viewer-fix' into 'main'

TaoBRGNSetRegularizationType

See merge request petsc/petsc!8297

TAOBRGN structure improvement, add TaoBRGNSet,GetRegularizationType

Merge branch 'rmills/feature-ml-petscregressor' into 'main'

Add basic PetscRegressor component with support for a few linear regressors

See merge request petsc/petsc!7709

Add initial version PetscRegressor, part of the planned machine learning (ML) toolkit

Co-authored-by: Mr. Hong Zhang <hongzhang@anl.gov>
Co-authored-by: Hansol Suh <hsuh@anl.gov>
Co-authored-by: Bar

Add initial version PetscRegressor, part of the planned machine learning (ML) toolkit

Co-authored-by: Mr. Hong Zhang <hongzhang@anl.gov>
Co-authored-by: Hansol Suh <hsuh@anl.gov>
Co-authored-by: Barry Smith <bsmith@petsc.dev>
Co-authored-by: Toby Isaac <toby.isaac@gmail.com>
Co-authored-by: Satish Balay <balay@mcs.anl.gov>

Mr. Hong Zhang developed the petsc4py interface and examples.
Hansol Suh provided extensive help with updating the code to the latest PETSc coding guidelines and APIs, some documentation development, getting documentation to build correctly, getting new tests into the test harness, and numerous big fixes plus minor changes.
Barry Smith provided extensive feedback and code to get the Fortran interfaces and documentation build working.
Toby Isaac provided a fix to prevent breakage with complex-arithmetic builds.
Satish Balay provided important help with fixing builds.

Thanks-to: Pierre Jolivet <pierre@joliv.et>
Thanks-to: Jed Brown <jed@jedbrown.org>
Thanks-to: Jose Roman <jroman@dsic.upv.es>
Thanks-to: Stefano Zampini <stefano.zampini@gmail.com>

Pierre, Jed, Jose, and Stefano provided extremely helpful feedback and suggestions during the merge review process.

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Merge branch 'jacobf/2023-08-17/header-guard-check' into 'main'

Check header guards

See merge request petsc/petsc!6822

Convert all header guards to pragma once

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

Feature: Bicycle Storage Facility 2

See merge request petsc/petsc!5661

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 'denera/bufgix-tao-brgn-python-bindings' into 'main'

petsc4py interfaces for TAOBRGN

See merge request petsc/petsc!3766

added explicit Hessian feature to BRGN

Merge branch 'brgn_lm' into 'master'

Levenberg-Marquardt optimization using BRGN

See merge request petsc/petsc!2964

Levenberg-Marquardt optimization using BRGN.

Adds diag(J^T J) as a regularizer to BRGN (called "lm"). With this
regularizer, BRGN is equivalent to a Levenberg-Marquardt algorithm.

Merge branch 'master' of bitbucket.org:petsc/petsc

Merged in xhuang/tao-feature-L1 (pull request #1385)

Adding L1-norm dictionary regularizer and user-defined regularizer support in TAOBRGN

Approved-by: BarryFSmith <bsmith@mcs.anl.gov>

Changes suggested by Barry except the .tex files and why use the define instead of enum

Both tomography and cs1 examples work with both l2prox and l1dict

algorithm structure changes to combine old L2 reg with new L1 reg, and permit user regularizers

read from binary Mat/Vec, eliminate the array datastructure, works for a small example now!

added D matrix for L1 norm

cleared comments of matrix vector dimension, and targeted problem to solve

the compressive sensing (sparse regression) test example works with brgn of the smoothed L1 form

tao-brgn add feature smoothed L1 norm algorithm, after meeting with Todd

brgn modified with approximation of L1 regularizer