Hello everyone! This is deal.II newsletter #246. It automatically reports recently merged features and discussions about the deal.II finite element library.
## Below you find a list of recently proposed or merged features: #14929: TrilinosWrappers::PreconditionBase deprecate AdditionalData and minor cleanup (proposed by sebproell) https://github.com/dealii/dealii/pull/14929 #14928: Add an empty() function to ArrayView (proposed by bergbauer) https://github.com/dealii/dealii/pull/14928 #14927: Introduce quadrature_points_indices() function for FEPointEvaluation (proposed by bergbauer) https://github.com/dealii/dealii/pull/14927 #14926: FEPointEvaluation: Remove unit_points member, access them through MappingInfo instead (proposed by bergbauer) https://github.com/dealii/dealii/pull/14926 #14924: Fix namespacing in the ExodusII error macro. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/14924 #14923: Remove obsolete CMake test for `MPI_SEEK_SET` (proposed by sloede; merged) https://github.com/dealii/dealii/pull/14923 #14921: Use <version> header for C++20 feature checks (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/14921 #14920: Move check about FECollection size to DoFHandler. (proposed by marcfehling) https://github.com/dealii/dealii/pull/14920 #14919: Simplify Trilinos solver's AdditionalData (proposed by sebproell; merged) https://github.com/dealii/dealii/pull/14919 #14918: [C++17] Use std::array instead of a C-style array. (proposed by bangerth) https://github.com/dealii/dealii/pull/14918 #14917: Update documentation of Quadrature. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/14917 #14916: Update description of UpdateFlags::update_quadrature_points. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/14916 #14915: Add a compatibility type for C++20's std::type_identity. (proposed by bangerth) https://github.com/dealii/dealii/pull/14915 #14914: Remove dummy changelog entry (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/14914 #14913: SolverFGMRES: refactor orthogonalization (proposed by peterrum) https://github.com/dealii/dealii/pull/14913 #14912: Fix formatting (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/14912 #14911: Fix a grammar mistake. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/14911 #14910: Make it more obvious that evaluation points are not quadrature points. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/14910 #14909: Update documentation for DataPostprocessor. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/14909 #14908: Do not ask for things we don't actually need. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/14908 #14907: Add test to ensure consistent constraints in parallel (proposed by kronbichler) https://github.com/dealii/dealii/pull/14907 #14906: Add a link to the documentation. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/14906 #14905: Add consistent strategy to merge constraints in parallel (proposed by bergbauer) https://github.com/dealii/dealii/pull/14905 #14904: Add instantiation to for off-diagonal contributions to DiagonalMatrix (proposed by bergbauer; merged) https://github.com/dealii/dealii/pull/14904 #14903: Select correct code path for neighbor elements in FEEvaluation (proposed by bergbauer; merged) https://github.com/dealii/dealii/pull/14903 #14902: Jenkins: enable and update arm MacOS build (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/14902 #14901: Remove DoFInfo::dimension (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/14901 #14900: Different documentation updates in `matrix_free` (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/14900 #14899: Do not allow assigning to rvalue references of Tensor. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/14899 #14898: Limit friend declarations for DofHandler and Triangulation to the same template arguments (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/14898 #14897: Fix concepts support for TpetraWrappers::Vector (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/14897 #14896: Doxygen: fix missing related link in ArrayView (proposed by sebproell; merged) https://github.com/dealii/dealii/pull/14896 #14895: Fix concepts support for clang++ (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/14895 #14894: FEEvaluation: use EvaluationFlags in documentation (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/14894 #14892: Use VectorizedArrayTrait (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/14892 #14890: CellWiseInverse: extend comments (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/14890 #14889: Clean up assert (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/14889 #14888: Update doxygen stylesheet to only use a white table.tutorial in light mode (proposed by GrahamBenHarper; merged) https://github.com/dealii/dealii/pull/14888 #14887: Add parse and create functions for simplices. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/14887 #14885: Explicit Instantiate GridTools::collect_periodic_faces with Meshtype = parallel::shared::triangulation<1,1> (proposed by nils-schween; merged) https://github.com/dealii/dealii/pull/14885 #14865: Expose eigenvectors of LAPACKFullMatrix (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/14865 #14850: Implement InverseCellwiseMassMatrix with tensor var. coeff. (proposed by btemuer; merged) https://github.com/dealii/dealii/pull/14850 #14835: Fix bug in result of SolverCG when run in interleaved mode (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/14835 #14491: CMake: port entire feature configuration to interface targets (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/14491 #14362: Execute explicit instantiations of compute_intersection_of_cells() (proposed by jh66637; merged) https://github.com/dealii/dealii/pull/14362 ## And this is a list of recently opened or closed discussions: #14925: Verify that external copies of boost actually include libraries (opened) https://github.com/dealii/dealii/issues/14925 #14922: Remove CMake test for `MPI_SEEK_SET` or make it more portable (opened and closed) https://github.com/dealii/dealii/issues/14922 #14893: Remove `VectorizedArrayType` from `FEEvaluation`/`MatrixFree`? (opened) https://github.com/dealii/dealii/issues/14893 #14891: Building docker image fails (opened and closed) https://github.com/dealii/dealii/issues/14891 #14879: GridTools::collect_periodic_faces with parallel:shared::Triangulation in 1D (closed) https://github.com/dealii/dealii/issues/14879 #14873: Doxygen site: forced dark mode has bright white table of contents in Firefox (closed) https://github.com/dealii/dealii/issues/14873 #14843: Adding tensor-valued variable coefficients to matrix-free CellwiseInverseMassMatrix (closed) https://github.com/dealii/dealii/issues/14843 #14804: Final library compilation stage takes forever (closed) https://github.com/dealii/dealii/issues/14804 A list of all major changes since the last release can be found at https://www.dealii.org/developer/doxygen/deal.II/recent_changes.html. Thanks for being part of the community! 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