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<li class="toctree-l2 has-children"><a class="reference internal" href="../manual/programming.html">The Solvers in PETSc/TAO</a><input class="toctree-checkbox" id="toctree-checkbox-3" name="toctree-checkbox-3" type="checkbox"/><label class="toctree-toggle" for="toctree-checkbox-3"><i class="fa-solid fa-chevron-down"></i></label><ul>
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<li class="toctree-l3"><a class="reference internal" href="../manual/mat.html">Matrices</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/ksp.html">KSP: Linear System Solvers</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/snes.html">SNES: Nonlinear Solvers</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/ts.html">TS: Scalable ODE and DAE Solvers</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/tao.html">TAO: Optimization Solvers</a></li>
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<li class="toctree-l2 has-children"><a class="reference internal" href="../manual/dm.html">DM: Interfacing Between Solvers and Models/Discretizations</a><input class="toctree-checkbox" id="toctree-checkbox-4" name="toctree-checkbox-4" type="checkbox"/><label class="toctree-toggle" for="toctree-checkbox-4"><i class="fa-solid fa-chevron-down"></i></label><ul>
<li class="toctree-l3"><a class="reference internal" href="../manual/dmbase.html">DM Basics</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/section.html">PetscSection: Connecting Grids to Data</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/dmplex.html">DMPlex: Unstructured Grids</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/dmstag.html">DMSTAG: Staggered, Structured Grid</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/dmnetwork.html">Networks</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/dt.html">PetscDT: Discretization Technology in PETSc</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/fe.html">PetscFE: Finite Element Infrastructure in PETSc</a></li>
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<li class="toctree-l2 has-children"><a class="reference internal" href="../manual/additional.html">Additional Information</a><input class="toctree-checkbox" id="toctree-checkbox-5" name="toctree-checkbox-5" type="checkbox"/><label class="toctree-toggle" for="toctree-checkbox-5"><i class="fa-solid fa-chevron-down"></i></label><ul>
<li class="toctree-l3"><a class="reference internal" href="../manual/fortran.html">PETSc for Fortran Users</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/versionchecking.html">Checking the PETSc version</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/matlab.html">Using MATLAB with PETSc</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/profiling.html">Profiling</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/performance.html">Hints for Performance Tuning</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/streams.html">STREAMS: Example Study</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/blas-lapack.html">The Use of BLAS and LAPACK in PETSc and external libraries</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/other.html">Other PETSc Features</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/advanced.html">Advanced Features of Matrices and Solvers</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manual/tests.html">Running PETSc Tests</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../manualpages/MatGraphOperations/index.html">Matrix colorings (MatColoring), orderings (MatOrdering), partitionings (MatPartitioning), and coarsening (MatCoarsen)</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../manualpages/DMStag/index.html">Staggered, Structured Grids (DMSTAG)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/DMPlex/index.html">Unstructured Grids and Cell Complexes (DMPLEX)</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../manualpages/DMForest/index.html">A Forest of Trees and Structured Adaptive Refinement (DMFOREST)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/DMPatch/index.html">Sequences of parallel mesh patches (DMPATCH)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/DMSwarm/index.html">Particle Discretizations (DMSWARM)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/DMMOAB/index.html">MOAB Mesh Representation (DMMOAB)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/DMLabel/index.html">Selecting Parts of Meshes (DMLabel)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/DMPRODUCT/index.html">Tensor products of meshes (DMRODUCT)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/DMComposite/index.html">DMComposite</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../manualpages/SPACE/index.html">Function Spaces (PetscSpace)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/DUALSPACE/index.html">Dual Spaces (PetscDualSpace)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/FE/index.html">Finite Elements (PetscFE)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/FV/index.html">Finite Volumes (PetscFV)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/PF/index.html">Defining your own mathematical functions (PF)</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/LANDAU/index.html">Landau Collision Operator</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../manualpages/Characteristic/index.html">Semi-Lagrangian Solves using the Method of Characteristics</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../manualpages/PetscH/index.html">Hash Tables</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/Log/index.html">Profiling and Logging</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../manualpages/Matlab/index.html">Matlab</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/Bag/index.html">Bag</a></li>
<li class="toctree-l3"><a class="reference internal" href="../manualpages/BM/index.html">Benchmarks (BM)</a></li>
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<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.22/docs"> 3.22</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.21/docs"> 3.21</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.20/docs"> 3.20</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.19/docs"> 3.19</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.18/docs"> 3.18</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.17/docs"> 3.17</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.16/docs"> 3.16</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.15/docs"> 3.15</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.14/docs"> 3.14</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.13/docs"> 3.13</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.12/docs"> 3.12</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.11/docs"> 3.11</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.10/docs"> 3.10</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.9/docs"> 3.9</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.8/docs"> 3.8</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.7/docs"> 3.7</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.6/docs"> 3.6</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.5/docs"> 3.5</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.4/docs"> 3.4</a></li>
<li class="toctree-l2"><a class="reference external" href="https://web.cels.anl.gov/projects/petsc/vault/petsc-3.3/docs"> 3.3</a></li>
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<section class="tex2jax_ignore mathjax_ignore" id="changes-3-21">
<h1>Changes: 3.21<a class="headerlink" href="#changes-3-21" title="Link to this heading">#</a></h1>
<p class="rubric">General:</p>
<ul class="simple">
<li><p>Add single precision support for using HYPRE and MFEM</p></li>
<li><p>Require Fortran 2003 compiler with GET_COMMAND_ARGUMENT() support for building PETSc with Fortran bindings</p></li>
</ul>
<p class="rubric">Configure/Build:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre">--download-blis-use-openmp=0</span></code> to force <code class="docutils notranslate"><span class="pre">download-blis</span></code> to not build with OpenMP when <code class="docutils notranslate"><span class="pre">with-openmp</span></code> is provided</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscBLASSetNumThreads.html">PetscBLASSetNumThreads</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscBLASGetNumThreads.html">PetscBLASGetNumThreads</a>()</span></code> for controlling how many threads the BLAS routines use</p></li>
<li><p>Change <code class="docutils notranslate"><span class="pre">win_cl</span></code> and similar <code class="docutils notranslate"><span class="pre">win32fe</span></code> compiler wrappers to <code class="docutils notranslate"><span class="pre">win32fe_cl</span></code></p></li>
<li><p>Add build support for Intel oneAPI compilers <code class="docutils notranslate"><span class="pre">icx</span></code> and <code class="docutils notranslate"><span class="pre">ifx</span></code> on Microsoft Windows with compiler wrappers <code class="docutils notranslate"><span class="pre">win32fe_icx</span></code> and <code class="docutils notranslate"><span class="pre">win32fe_ifx</span></code> (only static library build with <code class="docutils notranslate"><span class="pre">ifx</span></code>)</p></li>
<li><p>Add lib/petsc/bin/maint/runjobs.py list-of-jobs script to allow submitting a subset of the jobs to the CI</p></li>
</ul>
<p class="rubric">Sys:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/BM/PetscBench.html">PetscBench</a></span></code> an object class for managing benchmarks in PETSc</p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre">PetscVoidFunction</span></code>, <code class="docutils notranslate"><span class="pre">PetscVoidStarFunction</span></code>, and <code class="docutils notranslate"><span class="pre">PetscErrorCodeFunction</span></code> typedefs in favor of
<code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscVoidFn.html">PetscVoidFn</a></span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscErrorCodeFn.html">PetscErrorCodeFn</a></span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscOptionsBoundedReal.html">PetscOptionsBoundedReal</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscOptionsRangeReal.html">PetscOptionsRangeReal</a>()</span></code></p></li>
<li><p>Rename PETSc stream types to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscStreamType.html">PETSC_STREAM_DEFAULT</a></span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscStreamType.html">PETSC_STREAM_NONBLOCKING</a></span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscStreamType.html">PETSC_STREAM_DEFAULT_WITH_BARRIER</a></span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscStreamType.html">PETSC_STREAM_NONBLOCKING_WITH_BARRIER</a></span></code>. The root device context uses <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscStreamType.html">PETSC_STREAM_DEFAULT</a></span></code> by default</p></li>
</ul>
<p class="rubric">Event Logging:</p>
<p class="rubric">PetscViewer:</p>
<ul class="simple">
<li><p>Change <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Viewer/PetscViewerRestoreSubViewer.html">PetscViewerRestoreSubViewer</a>()</span></code> to no longer need a call to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Viewer/PetscViewerFlush.html">PetscViewerFlush</a>()</span></code> after it</p></li>
<li><p>Introduce <code class="docutils notranslate"><span class="pre">PetscOptionsRestoreViewer()</span></code> that must be called after <code class="docutils notranslate"><span class="pre">PetscOptionsGetViewer()</span></code> and <code class="docutils notranslate"><span class="pre">PetscOptionsGetViewers()</span></code>
to ensure thread safety</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre">PetscViewerASCIIWORLDSetFileUnit()</span></code></p></li>
</ul>
<p class="rubric">PetscDraw:</p>
<p class="rubric">AO:</p>
<p class="rubric">IS:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/IS/ISLocalToGlobalMappingGetNodeInfo.html">ISLocalToGlobalMappingGetNodeInfo</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/IS/ISLocalToGlobalMappingRestoreNodeInfo.html">ISLocalToGlobalMappingRestoreNodeInfo</a>()</span></code> to access neighboring information of local indices</p></li>
<li><p>Add support to load an <code class="docutils notranslate"><span class="pre"><a href="../manualpages/IS/ISLocalToGlobalMapping.html">ISLocalToGlobalMapping</a></span></code> via <code class="docutils notranslate"><span class="pre"><a href="../manualpages/IS/ISLocalToGlobalMappingLoad.html">ISLocalToGlobalMappingLoad</a>()</span></code> from data previously stored using <code class="docutils notranslate"><span class="pre"><a href="../manualpages/IS/ISLocalToGlobalMappingView.html">ISLocalToGlobalMappingView</a>()</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/IS/ISLocalToGlobalMappingGetBlockMultiLeavesSF.html">ISLocalToGlobalMappingGetBlockMultiLeavesSF</a>()</span></code> to share local block data</p></li>
</ul>
<p class="rubric">VecScatter / PetscSF:</p>
<ul class="simple">
<li><p>Add MPI-4.0 persistent neighborhood collectives support. Use -sf_neighbor_persistent along with -sf_type neighbor to enable it</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PetscSF/PetscSFCreateStridedSF.html">PetscSFCreateStridedSF</a>()</span></code> to communicate strided blocks of data</p></li>
</ul>
<p class="rubric">PF:</p>
<p class="rubric">Vec:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecGhostGetGhostIS.html">VecGhostGetGhostIS</a>()</span></code> to get the ghost indices of a ghosted vector</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre">-vec_mdot_use_gemv</span></code> to let <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecMDot.html">VecMDot</a>()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecMTDot.html">VecMTDot</a>()</span></code> use BLAS2 <code class="docutils notranslate"><span class="pre">gemv()</span></code> instead of custom unrolled kernel. Default is on</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre">-vec_maxpy_use_gemv</span></code> to let <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecMAXPY.html">VecMAXPY</a>()</span></code> use BLAS2 <code class="docutils notranslate"><span class="pre">gemv()</span></code> instead of custom unrolled kernel. Default is off</p></li>
<li><p><code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecReplaceArray.html">VecReplaceArray</a>()</span></code> on the first Vec obtained from <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecDuplicateVecs.html">VecDuplicateVecs</a>()</span></code> with either of the two above *_use_gemv options won’t work anymore. If needed, turn them off or use <code class="docutils notranslate"><span class="pre">VecDuplicateVec()</span></code> instead</p></li>
<li><p><code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecScale.html">VecScale</a>()</span></code> is now a logically collective operation</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecISShift.html">VecISShift</a>()</span></code> to shift a part of the vector</p></li>
<li><p><code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecISSet.html">VecISSet</a>()</span></code> does no longer accept NULL as index set</p></li>
<li><p><code class="docutils notranslate"><span class="pre"><a href="../manualpages/Vec/VecLoad.html">VecLoad</a>()</span></code> automatically determines whether the file was written using 32-bit or 64-bit indices, and files can read with PETSc built either way</p></li>
</ul>
<p class="rubric">PetscSection:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PetscSection/PetscSectionGetBlockStarts.html">PetscSectionGetBlockStarts</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PetscSection/PetscSectionSetBlockStarts.html">PetscSectionSetBlockStarts</a>()</span></code></p></li>
<li><p>Add argument to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PetscSection/PetscSectionCreateGlobalSection.html">PetscSectionCreateGlobalSection</a>()</span></code> that can ignore the local section permutation</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PetscSection/PetscSectionCreateComponentSubsection.html">PetscSectionCreateComponentSubsection</a>()</span></code></p></li>
</ul>
<p class="rubric">PetscPartitioner:</p>
<ul class="simple">
<li><p>Add edge weights to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/MatGraphOperations/PetscPartitionerPartition.html">PetscPartitionerPartition</a>()</span></code></p></li>
</ul>
<p class="rubric">Mat:</p>
<ul class="simple">
<li><p>Reset <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/MATLMVM.html">MATLMVM</a></span></code> history vectors if size is changed</p></li>
<li><p>Add specific support for <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatMultHermitianTranspose.html">MatMultHermitianTranspose</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatMultHermitianTransposeAdd.html">MatMultHermitianTransposeAdd</a>()</span></code> in <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MATSHELL.html">MATSHELL</a></span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MATDENSE.html">MATDENSE</a></span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MATNEST.html">MATNEST</a></span></code>, and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MATSCALAPACK.html">MATSCALAPACK</a></span></code></p></li>
<li><p>Add function <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatProductGetAlgorithm.html">MatProductGetAlgorithm</a>()</span></code></p></li>
<li><p><code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MATTRANSPOSEVIRTUAL.html">MATTRANSPOSEVIRTUAL</a></span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MATHERMITIANTRANSPOSEVIRTUAL.html">MATHERMITIANTRANSPOSEVIRTUAL</a></span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MATNORMAL.html">MATNORMAL</a></span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MATNORMALHERMITIAN.html">MATNORMALHERMITIAN</a></span></code>, and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MATCOMPOSITE.html">MATCOMPOSITE</a></span></code> now derive from <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MATSHELL.html">MATSHELL</a></span></code>. This implies a new behavior for those <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/Mat.html">Mat</a></span></code>, as calling <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatAssemblyBegin.html">MatAssemblyBegin</a>()</span></code>/<code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatAssemblyEnd.html">MatAssemblyEnd</a>()</span></code> destroys scalings and shifts for <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MATSHELL.html">MATSHELL</a></span></code>, but it was not previously the case for other <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatType.html">MatType</a></span></code></p></li>
<li><p>Add function <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatGetRowSumAbs.html">MatGetRowSumAbs</a>()</span></code> to compute vector of L1 norms of rows ([B]AIJ only)</p></li>
<li><p>Add partial support for <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatBackwardSolve.html">MatBackwardSolve</a>()</span></code>/<code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatForwardSolve.html">MatForwardSolve</a>()</span></code> with <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MATSOLVERMKL_PARDISO.html">MATSOLVERMKL_PARDISO</a></span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MATSOLVERMKL_CPARDISO.html">MATSOLVERMKL_CPARDISO</a></span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MATIS.html">MATIS</a></span></code> options <code class="docutils notranslate"><span class="pre">-matis_xxx</span></code>. Use <code class="docutils notranslate"><span class="pre">-mat_is_xxx</span></code></p></li>
<li><p>Add support for repeated entries in the local part of the local to global map for <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MATIS.html">MATIS</a></span></code> via the routines <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatISSetAllowRepeated.html">MatISSetAllowRepeated</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatISGetAllowRepeated.html">MatISGetAllowRepeated</a>()</span></code></p></li>
<li><p>Add support to dump and load a matrix of <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MATIS.html">MATIS</a></span></code> type</p></li>
<li><p>Add dense representations of symmetric Broyden matrices <code class="docutils notranslate"><span class="pre">MATLMVMDBFGS</span></code>, <code class="docutils notranslate"><span class="pre">MATLMVMDDFP</span></code>, and <code class="docutils notranslate"><span class="pre">MATLMVMDQN</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MATSELLHIP.html">MATSELLHIP</a></span></code> and the corresponding HIP kernels for matrix-vector multiplication</p></li>
</ul>
<p class="rubric">MatCoarsen:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/MatGraphOperations/MatCoarsenSetMaximumIterations.html">MatCoarsenSetMaximumIterations</a>()</span></code> with corresponding option <code class="docutils notranslate"><span class="pre">-mat_coarsen_max_it</span> <span class="pre"><4></span></code>. The number of iteration of the coarsening method. Used for the HEM coarsener</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/MatGraphOperations/MatCoarsenSetThreshold.html">MatCoarsenSetThreshold</a>()</span></code> with corresponding option <code class="docutils notranslate"><span class="pre">-mat_coarsen_threshold</span> <span class="pre"><-1></span></code>. Threshold for filtering graph for HEM. Like GAMG < 0 means no filtering</p></li>
<li><p>Change API for several PetscCD methods used internally in <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCGAMG.html">PCGAMG</a></span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatCoarsen.html">MatCoarsen</a></span></code> (eg, change <code class="docutils notranslate"><span class="pre">PetscCDSetChuckSize()</span></code> to <code class="docutils notranslate"><span class="pre">PetscCDSetChunckSize()</span></code>), remove <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/Mat.html">Mat</a></span></code> argument from``PetscCDGetASMBlocks()``</p></li>
</ul>
<p class="rubric">PC:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCGAMGSetLowMemoryFilter.html">PCGAMGSetLowMemoryFilter</a>()</span></code> with corresponding option <code class="docutils notranslate"><span class="pre">-pc_gamg_low_memory_threshold_filter</span></code>. Use the system <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatFilter.html">MatFilter</a></span></code> graph/matrix filter, without a temporary copy of the graph, otherwise use method that can be faster</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCGAMGASMSetHEM.html">PCGAMGASMSetHEM</a>()</span></code> with corresponding option <code class="docutils notranslate"><span class="pre">-pc_gamg_asm_hem_aggs</span> <span class="pre">N</span></code>. Use ASM smoother constructed from N applications of heavy edge matching</p></li>
<li><p><code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCMAT.html">PCMAT</a></span></code> use <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Mat/MatSolve.html">MatSolve</a>()</span></code> if implemented by the matrix type</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCLMVMSetUpdateVec.html">PCLMVMSetUpdateVec</a>()</span></code> for the automatic update of the LMVM preconditioner inside a SNES solve</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCGAMGSetInjectionIndex.html">PCGAMGSetInjectionIndex</a>()</span></code> with corresponding option <code class="docutils notranslate"><span class="pre">-pc_gamg_injection_index</span> <span class="pre">i,j,k...</span></code>. Inject provided indices of fine grid operator as first coarse grid restriction (sort of p-multigrid for C1 elements)</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCJacobiType.html">PC_JACOBI_ROWL1</a></span></code> to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCJacobiType.html">PCJacobiType</a></span></code> to use (scaled) l1 row norms for diagonal approximation with scaling of off-diagonal elements</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCJacobiSetRowl1Scale.html">PCJacobiSetRowl1Scale</a>()</span></code> and <code class="docutils notranslate"><span class="pre">-pc_jacobi_rowl1_scale</span> <span class="pre">scale</span></code> to access new scale member of PC_Jacobi class, for new row l1 Jacobi</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre">-mg_fine_...</span></code> prefix alias for fine grid options to override <code class="docutils notranslate"><span class="pre">-mg_levels_...</span></code> options, like <code class="docutils notranslate"><span class="pre">-mg_coarse_...</span></code></p></li>
<li><p>The generated sub-matrices in <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCFIELDSPLIT.html">PCFIELDSPLIT</a></span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCASM.html">PCASM</a></span></code>, and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCBJACOBI.html">PCBJACOBI</a></span></code> now retain any null space or near null space attached to them even if the non-zero structure of the outer matrix changes</p></li>
<li><p>Add support for multiple subdomain per MPI process in <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCBDDC.html">PCBDDC</a></span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCJacobiGetDiagonal.html">PCJacobiGetDiagonal</a>()</span></code> to access the Jacobi inverted matrix diagonal and its square root variant</p></li>
</ul>
<p class="rubric">KSP:</p>
<p class="rubric">SNES:</p>
<ul class="simple">
<li><p>Add support for Quasi-Newton models in <code class="docutils notranslate"><span class="pre"><a href="../manualpages/SNES/SNESNEWTONTR.html">SNESNEWTONTR</a></span></code> via <code class="docutils notranslate"><span class="pre"><a href="../manualpages/SNES/SNESNewtonTRSetQNType.html">SNESNewtonTRSetQNType</a></span></code></p></li>
<li><p>Add support for trust region norm customization in <code class="docutils notranslate"><span class="pre"><a href="../manualpages/SNES/SNESNEWTONTR.html">SNESNEWTONTR</a></span></code> via <code class="docutils notranslate"><span class="pre"><a href="../manualpages/SNES/SNESNewtonTRSetNormType.html">SNESNewtonTRSetNormType</a></span></code></p></li>
<li><p>Remove default of <code class="docutils notranslate"><span class="pre"><a href="../manualpages/KSP/KSPPREONLY.html">KSPPREONLY</a></span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/PC/PCLU.html">PCLU</a></span></code> for <code class="docutils notranslate"><span class="pre"><a href="../manualpages/SNES/SNESNASM.html">SNESNASM</a></span></code> subdomain solves: for <code class="docutils notranslate"><span class="pre"><a href="../manualpages/SNES/SNESASPIN.html">SNESASPIN</a></span></code> use <code class="docutils notranslate"><span class="pre">-npc_sub_ksp_type</span> <span class="pre">preonly</span> <span class="pre">-npc_sub_pc_type</span> <span class="pre">lu</span></code></p></li>
<li><p>Add function typedefs <code class="docutils notranslate"><span class="pre"><a href="../manualpages/SNES/SNESInitialGuessFn.html">SNESInitialGuessFn</a></span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/SNES/SNESFunctionFn.html">SNESFunctionFn</a></span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/SNES/SNESObjectiveFn.html">SNESObjectiveFn</a></span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/SNES/SNESJacobianFn.html">SNESJacobianFn</a></span></code>, and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/SNES/SNESNGSFn.html">SNESNGSFn</a></span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre">DMDASNESFunction</span></code>, <code class="docutils notranslate"><span class="pre">DMDASNESJacobian</span></code>, <code class="docutils notranslate"><span class="pre">DMDASNESObjective</span></code>, <code class="docutils notranslate"><span class="pre">DMDASNESFunctionVec</span></code>, <code class="docutils notranslate"><span class="pre">DMDASNESJacobianVec</span></code>, and <code class="docutils notranslate"><span class="pre">DMDASNESObjectiveVec</span></code>
in favor of <code class="docutils notranslate"><span class="pre">DMDASNESFunctionFn</span></code>, <code class="docutils notranslate"><span class="pre">DMDASNESJacobianFn</span></code>, <code class="docutils notranslate"><span class="pre">DMDASNESObjectiveFn</span></code>, <code class="docutils notranslate"><span class="pre">DMDASNESFunctionVecFn</span></code>, <code class="docutils notranslate"><span class="pre">DMDASNESJacobianVecFn</span></code>, and <code class="docutils notranslate"><span class="pre">DMDASNESObjectiveVecFn</span></code></p></li>
</ul>
<p class="rubric">SNESLineSearch:</p>
<ul class="simple">
<li><p>Deprecate <code class="docutils notranslate"><span class="pre">SNESLineSearchShellSetUserFunc()</span></code> and <code class="docutils notranslate"><span class="pre">SNESLineSearchShellGetUserFunc()</span></code> in favor of <code class="docutils notranslate"><span class="pre"><a href="../manualpages/SNES/SNESLineSearchShellSetApply.html">SNESLineSearchShellSetApply</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/SNES/SNESLineSearchShellGetApply.html">SNESLineSearchShellGetApply</a>()</span></code></p></li>
</ul>
<p class="rubric">TS:</p>
<ul class="simple">
<li><p>Add support for custom predictor callbacks in the second-order generalized-alpha method using <code class="docutils notranslate"><span class="pre"><a href="../manualpages/TS/TSAlpha2SetPredictor.html">TSAlpha2SetPredictor</a>()</span></code></p></li>
<li><p>Allow adaptivity to change time step size in first step of second-order generalized-alpha method</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/TS/TSSetPostEventStep.html">TSSetPostEventStep</a>()</span></code> to control the first step after event</p></li>
<li><p>Rename <code class="docutils notranslate"><span class="pre">TSSetPostEventIntervalStep()</span></code> to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/TS/TSSetPostEventSecondStep.html">TSSetPostEventSecondStep</a>()</span></code>, controlling the second step after event</p></li>
<li><p>Rename option <code class="docutils notranslate"><span class="pre">-ts_event_post_eventinterval_step</span></code> to <code class="docutils notranslate"><span class="pre">-ts_event_post_event_second_step</span></code></p></li>
<li><p>Change the (event) indicator functions type from <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscScalar.html">PetscScalar</a>[]</span></code> to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Sys/PetscReal.html">PetscReal</a>[]</span></code> in the user <code class="docutils notranslate"><span class="pre">indicator()</span></code> callback set by <code class="docutils notranslate"><span class="pre"><a href="../manualpages/TS/TSSetEventHandler.html">TSSetEventHandler</a>()</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/TS/TSGetStepRollBack.html">TSGetStepRollBack</a>()</span></code> to access the internal rollback flag</p></li>
<li><p>Add boolean flag to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/TS/TSSetResize.html">TSSetResize</a>()</span></code> to control when to resize</p></li>
</ul>
<p class="rubric">TAO:</p>
<ul class="simple">
<li><p>Deprecate <code class="docutils notranslate"><span class="pre">TaoCancelMonitors()</span></code> (resp. <code class="docutils notranslate"><span class="pre">-tao_cancelmonitors</span></code>) in favor of <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Tao/TaoMonitorCancel.html">TaoMonitorCancel</a>()</span></code> (resp. <code class="docutils notranslate"><span class="pre">-tao_monitor_cancel</span></code>)</p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre">-tao_view_gradient</span></code>, <code class="docutils notranslate"><span class="pre">-tao_view_ls_residual</span></code>, <code class="docutils notranslate"><span class="pre">-tao_view_solution</span></code>, and <code class="docutils notranslate"><span class="pre">-tao_view_stepdirection</span></code> in favor of
<code class="docutils notranslate"><span class="pre">-tao_monitor_gradient</span></code>, <code class="docutils notranslate"><span class="pre">-tao_monitor_ls_residual</span></code>, <code class="docutils notranslate"><span class="pre">-tao_monitor_solution</span></code>, and <code class="docutils notranslate"><span class="pre">-tao_monitor_step</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre">-tao_draw_solution</span></code>, <code class="docutils notranslate"><span class="pre">-tao_draw_gradient</span></code>, and <code class="docutils notranslate"><span class="pre">-tao_draw_step</span></code> in favor of <code class="docutils notranslate"><span class="pre">-tao_monitor_solution_draw</span></code>, <code class="docutils notranslate"><span class="pre">-tao_monitor_gradient_draw</span></code>, and <code class="docutils notranslate"><span class="pre">-tao_monitor_step_draw</span></code></p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre">TaoSetMonitor()</span></code> in favor of <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Tao/TaoMonitorSet.html">TaoMonitorSet</a>()</span></code></p></li>
<li><p>Deprecate all of the provided <code class="docutils notranslate"><span class="pre"><a href="../manualpages/Tao/Tao.html">Tao</a></span></code> monitor routine names in favor of the standard PETSc naming conventions</p></li>
</ul>
<p class="rubric">DM/DA:</p>
<ul class="simple">
<li><p>Add MPI reduction inside <code class="docutils notranslate"><span class="pre">SNESComputeObjective_DMDA()</span></code>. No need to call reduction in local callback</p></li>
<li><p>Deprecate <code class="docutils notranslate"><span class="pre">PetscSimplePointFunc</span></code> in favor of <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DT/PetscSimplePointFn.html">PetscSimplePointFn</a></span></code></p></li>
<li><p>Move <code class="docutils notranslate"><span class="pre">DMPlexReorderDefaultFlag</span></code> to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMReorderDefaultFlag.html">DMReorderDefaultFlag</a></span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMCreateSectionPermutation.html">DMCreateSectionPermutation</a>()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMReorderSectionGetType.html">DMReorderSectionGetType</a>()</span></code>, and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMReorderSectionSetType.html">DMReorderSectionSetType</a>()</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMReorderSectionGetDefault.html">DMReorderSectionGetDefault</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMReorderSectionSetDefault.html">DMReorderSectionSetDefault</a>()</span></code> to allow point permutations when sections are built automatically</p></li>
<li><p>Change interface to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMCreateSectionSubDM.html">DMCreateSectionSubDM</a>()</span></code> to add component specification</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMDA/DMDAGetBoundaryType.html">DMDAGetBoundaryType</a>()</span></code></p></li>
</ul>
<p class="rubric">DMSwarm:</p>
<ul class="simple">
<li><p>Add continuous <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DM.html">DM</a></span></code> argument to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMSwarmProjectFields.html">DMSwarmProjectFields</a>()</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre">DMSwarmGetFieldInfo()</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMSwarm/DMSwarmVectorGetField.html">DMSwarmVectorGetField</a>()</span></code></p></li>
</ul>
<p class="rubric">DMPlex:</p>
<ul class="simple">
<li><p>Drop support for MED, i.e. remove <code class="docutils notranslate"><span class="pre">DMPlexCreateMedFromFile()</span></code> and <code class="docutils notranslate"><span class="pre">--with-med</span></code></p></li>
<li><p>Change protototype of <code class="docutils notranslate"><span class="pre"><a href="../manualpages/SNES/DMPlexSetSNESLocalFEM.html">DMPlexSetSNESLocalFEM</a>()</span></code>. Now it accepts a single context and a Boolean indicating to use the objective function callback</p></li>
<li><p>Replace <code class="docutils notranslate"><span class="pre">DMProjectCoordinates()</span></code> with <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMSetCoordinateDisc.html">DMSetCoordinateDisc</a>()</span></code></p></li>
<li><p>Add argument to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMPlex/DMPlexCreateCoordinateSpace.html">DMPlexCreateCoordinateSpace</a>()</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMPlex/DMPlexCoordMap.html">DMPlexCoordMap</a></span></code> and some default maps</p></li>
<li><p>Add Boolean argument to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMPlex/DMPlexPartitionLabelCreateSF.html">DMPlexPartitionLabelCreateSF</a>()</span></code> to sort ranks</p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMClearAuxiliaryVec.html">DMClearAuxiliaryVec</a>()</span></code> to clear the auxiliary data</p></li>
<li><p>Add ignoreLabelHalo, sanitizeSubmesh, and ownershipTransferSF arguments to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMPlex/DMPlexFilter.html">DMPlexFilter</a>()</span></code></p></li>
<li><p>Change <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMPlex/DMPlexSetIsoperiodicFaceSF.html">DMPlexSetIsoperiodicFaceSF</a>()</span></code>, <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMPlex/DMPlexGetIsoperiodicFaceSF.html">DMPlexGetIsoperiodicFaceSF</a>()</span></code>, and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMPlex/DMPlexSetIsoperiodicFaceTransform.html">DMPlexSetIsoperiodicFaceTransform</a>()</span></code> to accept multiple values for different periodic pairings</p></li>
</ul>
<p class="rubric">FE/FV:</p>
<ul class="simple">
<li><p>Add Jacobian type argument to <code class="docutils notranslate"><span class="pre"><a href="../manualpages/FE/PetscFEIntegrateBdJacobian.html">PetscFEIntegrateBdJacobian</a>()</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/FV/PetscFVClone.html">PetscFVClone</a>()</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/FV/PetscFVCreateDualSpace.html">PetscFVCreateDualSpace</a>()</span></code></p></li>
</ul>
<p class="rubric">DMNetwork:</p>
<p class="rubric">DMStag:</p>
<ul class="simple">
<li><p>Add support for <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMLocalToLocalBegin.html">DMLocalToLocalBegin</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DM/DMLocalToLocalEnd.html">DMLocalToLocalEnd</a>()</span></code></p></li>
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMStag/DMStagSetRefinementFactor.html">DMStagSetRefinementFactor</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DMStag/DMStagGetRefinementFactor.html">DMStagGetRefinementFactor</a>()</span></code> to set and get the refinement ratio</p></li>
<li><p>Add support for arbitrary refinement ratio and degree of freedom in interpolation and restriction</p></li>
</ul>
<p class="rubric">DT:</p>
<ul class="simple">
<li><p>Add <code class="docutils notranslate"><span class="pre"><a href="../manualpages/DT/PetscDSUpdateBoundaryLabels.html">PetscDSUpdateBoundaryLabels</a>()</span></code></p></li>
</ul>
<p class="rubric">Fortran:</p>
</section>
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