Hello everyone! This is deal.II newsletter #192. 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: #13004: Avoid dereferencing a past-the-end iterator (proposed by kronbichler) https://github.com/dealii/dealii/pull/13004 #13003: Use pre-compiled code for CellwiseInverseMassMatrix (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/13003 #13002: Fix and augment documentation. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13002 #13001: Introduce internal::VectorizedArrayTrait and use it (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13001 #13000: Help compiler exploit hanging-node symmetries by reduced reg loads (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/13000 #12999: Add FEEvaluationImplHangingNodes::RunTypes::scalar (proposed by peterrum) https://github.com/dealii/dealii/pull/12999 #12997: Move FEEvaluationImplHangingNodes::run_internal() into a specialized class (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12997 #12996: Stylist clean-up in FEEvaluationImplHangingNodes (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12996 #12995: Use std::vector instead of Table (proposed by elauksap; merged) https://github.com/dealii/dealii/pull/12995 #12994: Vectorize evaluation of hanging node interpolation (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/12994 #12992: Fix bug MatrixFree::reinit (proposed by Rombur; merged) https://github.com/dealii/dealii/pull/12992 #12991: delete sequential code in big MPI datatype (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/12991 #12990: Do not split evaluation_template_factory_hanging_nodes instantiations (proposed by kronbichler) https://github.com/dealii/dealii/pull/12990 #12989: Fix compile warning by adding copy constructor to hp iterator (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/12989 #12988: Use extractors for local_rhs in step-22 (proposed by fdrmrc; merged) https://github.com/dealii/dealii/pull/12988 #12987: Make sure MPI BigData objects are always destroyed. (proposed by bangerth) https://github.com/dealii/dealii/pull/12987 #12985: Improve default behaviour of CUDAWrappers::MatrixFree::reinit() (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12985 #12984: Remove set_vertex_dof_index(). (proposed by drwells; merged) https://github.com/dealii/dealii/pull/12984 #12983: Allow reusing mapping data in FEPointEvaluation (proposed by gassmoeller) https://github.com/dealii/dealii/pull/12983 #12982: Add iterator traits to hp::CollectionIterator (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12982 #12981: VectorizedArray: Simplify compare_and_apply_mask by blend instruction (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/12981 #12980: Fix CellAccessor::neighbor_child_on_subface() (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12980 #12979: Fix GridGenerator::merge_triangulations() for simplex meshes (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12979 #12978: add Assert to get_mg_dof_indices (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/12978 #12977: Refactor HangingNodes::setup_constraints() (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12977 #12976: Add assert to FEImmersedSurfaceValues (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12976 #12975: Added extractors in local_rhs in step-22 (proposed by fdrmrc) https://github.com/dealii/dealii/pull/12975 #12973: fix checkpointing with >2GB per process (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/12973 #12972: Update the documentation on iterator filters. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/12972 #12971: Use iterator filters in tests/. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/12971 #12969: Fix bug in build system when using Kokkos (proposed by Rombur; merged) https://github.com/dealii/dealii/pull/12969 #12967: More work for COMSOL meshes (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/12967 #12965: Use iterator filters in our code base. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/12965 ## And this is a list of recently opened or closed discussions: #12998: Memory leak `Table`/`AlignedVector` (opened) https://github.com/dealii/dealii/issues/12998 #12993: Memory leak with simplex meshes (opened and closed) https://github.com/dealii/dealii/issues/12993 #12986: Big MPI data type test fails (opened) https://github.com/dealii/dealii/issues/12986 #12974: Bug: writing large vtu files fails (opened) https://github.com/dealii/dealii/issues/12974 #11380: SUNDIALS: replace copy with N_Vector module (closed) https://github.com/dealii/dealii/issues/11380 #11039: step-22 uses extractors for the matrix but not for the right hand side (closed) https://github.com/dealii/dealii/issues/11039 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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