Hello everyone! This is deal.II newsletter #188. 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: #12899: Improve an error message. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/12899 #12898: Allow gnuplot output for triangles. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/12898 #12897: Fix some typos (proposed by gfcas; merged) https://github.com/dealii/dealii/pull/12897 #12896: Split up matrix_tools.h -> matrix_creator.h (proposed by peterrum) https://github.com/dealii/dealii/pull/12896 #12895: Make DataOutFaces work with simplices (proposed by bangerth) https://github.com/dealii/dealii/pull/12895 #12893: hp::Collection: allow range-based loop (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12893 #12892: MGTwoLevelTransfer: make AffineConstraints optional (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12892 #12891: MGTwoLevelTransfer: enable FE_Nothing (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12891 #12890: ARKode: set stop time for incremental solve (proposed by sebproell) https://github.com/dealii/dealii/pull/12890 #12889: Fix compilation (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12889 #12888: Simplify the code for outputting data in gnuplot format. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/12888 #12887: Relax an assert in DoFTools::map_dofs_to_support_points (proposed by Rombur; merged) https://github.com/dealii/dealii/pull/12887 #12886: Fix typos in hp::FECollection doc (proposed by gfcas; merged) https://github.com/dealii/dealii/pull/12886 #12885: It's never just one thing... (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/12885 #12884: Corrections in Step-45 (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/12884 #12883: Added DOI for the tutorial program step-82 (proposed by dianeguignard; merged) https://github.com/dealii/dealii/pull/12883 #12882: [9.3] Cherry pick #12634 (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/12882 #12881: [9.3] Cherry pick #12830 (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/12881 #12880: Rename some variables in MGTransferGlobalCoarsening (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12880 #12879: Fix compilation of MGTransferGlobalCoarsening::interpolate_to_mg() (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12879 #12878: Introduce TriaAccessor::combined_face_orientation() (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12878 #12877: Do not preset Patch::reference_cell. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/12877 #12876: Fix Patch member functions. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/12876 #12875: Make Patch<0,spacedim>::reference_cell const. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/12875 #12874: Make Patch<0,spacedim>::n_subdivisions a 'const' variable. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/12874 #12872: Fix a typo. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/12872 #12871: avoid unused variable warning (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/12871 #12869: Fix docu of PreconditionChebyshev (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12869 #12868: Make code a bit more readable. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/12868 #12867: Make code a bit more readable. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/12867 #12866: Update class Quadrature in a couple of ways (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/12866 #12865: Avoid generation of expensive FE objects. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/12865 #12864: PETScWrappers::MPI::Vector: add new reinit() (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12864 #12863: SparseMatrix::reinit(): accept other sparse matrix (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12863 #12862: MatrixCreator: make SparseMatrixType a template parameter (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12862 #12861: Add a changelog entry for pr12787 (proposed by vachan-potluri; merged) https://github.com/dealii/dealii/pull/12861 #12860: Do not a priori allocate memory for objects that will later be re-sized. (proposed by bangerth) https://github.com/dealii/dealii/pull/12860 #12859: Towards making DataOutFaces work with simplices. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/12859 #12858: Add MGTransferGlobalCoarsening::interpolate_to_mg() that does not take DoFHandler (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12858 #12855: fix step-49 geo file (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/12855 #12847: DataOut for pyramids: reorder at the end (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12847 #12838: FE_Q_iso_Q1: varying subdivisions (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12838 #12832: variable checkpointing fixes for >4GB files (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/12832 #12825: Do not communicate vertices automatically to p4est in debug mode. (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/12825 ## And this is a list of recently opened or closed discussions: #12894: Support for Kokkos in deal.II (opened) https://github.com/dealii/dealii/issues/12894 #12873: MPI IO file write with >2GB individual writes (opened) https://github.com/dealii/dealii/issues/12873 #12870: Ordering of evaluation points when outputting data on higher-subdivision tets (opened) https://github.com/dealii/dealii/issues/12870 #12842: Ordering of vertices for wedges and pyramids (closed) https://github.com/dealii/dealii/issues/12842 #12826: step-49 example gmsh input file doesn't work (closed) https://github.com/dealii/dealii/issues/12826 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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