Hello everyone! This is deal.II newsletter #194. 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: #13102: Correct typo (math rendering) (proposed by mwichro) https://github.com/dealii/dealii/pull/13102 #13101: Bug fix of MF face eval for hanging nodes and non-standard orientation (proposed by kronbichler) https://github.com/dealii/dealii/pull/13101 #13099: [WIP] Global coarsening: compress weights (proposed by peterrum) https://github.com/dealii/dealii/pull/13099 #13097: Util::MPI::compute_n_point_to_point_communications() add fallback (proposed by peterrum) https://github.com/dealii/dealii/pull/13097 #13096: Boundary values: Use alias fe instead of cell->get_fe() (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/13096 #13095: Fixed bug in SparseDirectUMFPACK #12916 (proposed by kuljitvirk) https://github.com/dealii/dealii/pull/13095 #13094: Fix a comment's grammar. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13094 #13093: Remove a redundant argument to xargs. (proposed by drwells) https://github.com/dealii/dealii/pull/13093 #13091: Alternative way to avoid warnings. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13091 #13090: Fix a warning about array accesses. (proposed by bangerth) https://github.com/dealii/dealii/pull/13090 #13088: Avoid the need for empty lambda functions in ConsensusAlgorithms::AnonymousProcess. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13088 #13087: Minor fix to an error message. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13087 #13086: Rename 'filter' to 'filter.pl'. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13086 #13083: Document exception behavior for threads. (proposed by bangerth) https://github.com/dealii/dealii/pull/13083 #13082: Allow multiple messages to the same target in the NPX algorithm. (proposed by bangerth) https://github.com/dealii/dealii/pull/13082 #13081: Update step-66 (proposed by gfcas; merged) https://github.com/dealii/dealii/pull/13081 #13080: Minor doc changes to the consensus algorithms (proposed by bangerth) https://github.com/dealii/dealii/pull/13080 #13079: Evaluation kernels: Avoid checking the orientations in inner loop (proposed by kronbichler) https://github.com/dealii/dealii/pull/13079 #13078: Eliminate FEEvaluationData::get_all_face_numbers () and get_all_face_orientations () (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13078 #13077: Evaluation kernels: Make sure to pick vectorized gather function (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/13077 #13076: MatrixFree::gather_evalute(): allow mixed numbers (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13076 #13075: Remove an unnecessary semicolon. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13075 #13073: Convert a few more locally-owned loops with filters. (proposed by bangerth) https://github.com/dealii/dealii/pull/13073 #13072: Fix the spelling of a function name. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13072 #13071: Use one instead of two regexes. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13071 #13070: Ignore some more TBB warnings. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/13070 #13069: Update a link. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13069 #13068: Add some explicit casts to IndexSet. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/13068 #13067: [WIP] Geometric global coarsening: enable FE_Nothing (proposed by peterrum) https://github.com/dealii/dealii/pull/13067 #13066: Avoid quadratic complexity in IndexSet::subtract_set (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/13066 #13065: Global coarsening: specialize code for FE_Q (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13065 #13064: Global coarsening: simplify the determination of weights (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13064 #13063: [WIP] Implement FEFaceEvaluation::evaluate() for ECL/unstructured meshes (proposed by peterrum) https://github.com/dealii/dealii/pull/13063 #13062: Fix some various typos and dead links. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/13062 #13061: Fix pyramid output in DataOutBase::write_gnuplot(). (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13061 #13060: Also support wedges and pyramids in GridOut::write_gnuplot() (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13060 #13059: Add tests for MatrixFree + shared-memory MPI (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13059 #13058: MatrixFree: fix orientation for cell-centric loop and pbc (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13058 #13057: Add TBB to github actions. (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/13057 #13056: Simplify calls to FEEvaluation kernels (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/13056 #13054: FEEvaluationBase::apply_hanging_node_constraints(): clean up (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13054 #13053: Fix MGTwoLevelTransfer::reinit_geometric_transfer for DG <-> CG (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13053 #13050: bundled/tbb: avoid a warning when compiling with -std=c++17 (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/13050 #13049: avoid another boost deprecated headers warning (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/13049 #13048: [WIP] Use FEEvaluationHangingNodes in MGTwoLevelTransfer (proposed by peterrum) https://github.com/dealii/dealii/pull/13048 #13047: CMake: set the taskflow feature default to disabled (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/13047 #13046: FEEvaluationImplHangingNodes: use ShapeInfo as input argument (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13046 #13045: Further WorkStream cleanups (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13045 #13044: Add Triangulation::all_reference_cells_are_simplex() and ::is_mixed_mesh() (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13044 #13043: Remove simplex from .clang-format (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13043 #13042: MatrixFree: distinguish internally between mixed and non-mixed meshes (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13042 #13041: Fixed bug in SparseDirectUMFPACK #12916 (proposed by kuljitvirk) https://github.com/dealii/dealii/pull/13041 #13038: p::f::T: allow repartitioning (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13038 #13036: Boost: Disallow version 1.77 due to multiple unresolved upstream bugs (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/13036 #13035: Enable GridOut::write_gmsh() for simplex meshes (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13035 #13019: Skip a bunch of work for tests that we don't actually want. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13019 #13018: Spawn tasks via the TBB again. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13018 #13017: Make evaluation_kernels only include FEEvaluationData file (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/13017 #12990: Do not split evaluation_template_factory_hanging_nodes instantiations (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/12990 #12958: CMake: Add configure support for TBB OneAPI layout (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/12958 #12953: Make dimension counters unsigned. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/12953 ## And this is a list of recently opened or closed discussions: #13100: PETSc object is in wrong state (opened) https://github.com/dealii/dealii/issues/13100 #13098: Compilation error because of complex<double> and matrix-free. (opened) https://github.com/dealii/dealii/issues/13098 #13092: Inordinately costly setup of linear operators with Trilinos (opened) https://github.com/dealii/dealii/issues/13092 #13089: Fix indent script warnings (opened) https://github.com/dealii/dealii/issues/13089 #13085: Make ExtrapolateImplementation::send_cells() more efficient. (opened) https://github.com/dealii/dealii/issues/13085 #13084: Specialize consensus algorithms for the case where no answer is required (opened) https://github.com/dealii/dealii/issues/13084 #13074: Failure in ConsensusAlgorithms::NBX<T1, T2>::answer_requests() (opened) https://github.com/dealii/dealii/issues/13074 #13055: p::d::T updating ghost cells mat-id (opened) https://github.com/dealii/dealii/issues/13055 #13052: Warnings in data_out_base.cc (opened) https://github.com/dealii/dealii/issues/13052 #13051: Warning with newer GCC versions in matrix_free/fe_evaluation.h (opened and closed) https://github.com/dealii/dealii/issues/13051 #13037: Compatibility with Boost 1.77 and upcoming Boost 1.78 (opened) https://github.com/dealii/dealii/issues/13037 #13020: BOOST uses deprecated BOOST headers :-( (closed) https://github.com/dealii/dealii/issues/13020 #12817: Compilation with boost-1.77 fails due to "Operation not implemented" in geometry (closed) https://github.com/dealii/dealii/issues/12817 #12425: Failing tests fe_tools_extrapolate (closed) https://github.com/dealii/dealii/issues/12425 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. 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