# Changes: Development

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```{rubric} General:
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```{rubric} Configure/Build:
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```{rubric} Sys:
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- Deprecate `PetscSSEIsEnabled()`

```{rubric} Event Logging:
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```{rubric} PetscViewer:
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- Add `PetscViewerHDF5SetCompress()` and `PetscViewerHDF5GetCompress()`

```{rubric} PetscDraw:
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```{rubric} AO:
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```{rubric} IS:
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```{rubric} VecScatter / PetscSF:
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```{rubric} PF:
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```{rubric} Vec:
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```{rubric} PetscSection:
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```{rubric} PetscPartitioner:
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```{rubric} Mat:
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- Add `MatConstantDiagonalGetConstant()`

```{rubric} MatCoarsen:
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```{rubric} PC:
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- Add `PCMatApplyTranspose()`
- Remove `PC_ApplyMultiple`

```{rubric} KSP:
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- Add `MatLMVMGetLastUpdate()`
- Add `MatLMVMMultAlgorithm`, `MatLMVMSetMultAlgorithm()`, and `MatLMVMGetMultAlgorithm()`
- Add `MatLMVMSymBroydenGetPhi()` and `MatLMVMSymBroydenSetPhi()`
- Add `MatLMVMSymBadBroydenGetPsi()` and `MatLMVMSymBadBroydenSetPsi()`
- Deprecate `KSP_CONVERGED_RTOL_NORMAL` in favor of `KSP_CONVERGED_RTOL_NORMAL_EQUATIONS` and `KSP_CONVERGED_ATOL_NORMAL` in favor of `KSP_CONVERGED_ATOL_NORMAL_EQUATIONS`

```{rubric} SNES:
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```{rubric} SNESLineSearch:
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```{rubric} TS:
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```{rubric} TAO:
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- Add ``TaoBRGNSetRegularizationType()``, ``TaoBRGNGetRegularizationType()``

```{rubric} PetscRegressor:
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- Add new component to support regression and classification machine learning tasks: [](ch_regressor)
- Add `PetscRegressor` type `PETSCREGRESSORLINEAR` for solving linear regression problems with optional regularization

```{rubric} DM/DA:
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```{rubric} DMSwarm:
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```{rubric} DMPlex:
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- Add `DMPlexGetTransform()`, `DMPlexSetTransform()`, `DMPlexGetSaveTransform()`, and `DMPlexSetSaveTransform()`
- Add `DMPlexGetCoordinateMap()` and `DMPlexSetCoordinateMap()`
- Add `DMPlexTransformCohesiveExtrudeGetUnsplit()`
- Add `DMFieldCreateDefaultFaceQuadrature()`

```{rubric} FE/FV:
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- Add `PetscFEExpandFaceQuadrature()`

```{rubric} DMNetwork:
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```{rubric} DMStag:
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```{rubric} DT:
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```{rubric} Fortran:
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