Hello everyone! This is deal.II newsletter #65. 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: #7667: Fix serialization of variable data attachements (proposed by gassmoeller) https://github.com/dealii/dealii/pull/7667 #7666: Ensure particle property initialization (proposed by gassmoeller) https://github.com/dealii/dealii/pull/7666 #7663: cmake: add an option to disable SIMD (proposed by davydden) https://github.com/dealii/dealii/pull/7663 #7661: Fix invalid memory access in particle properties after transfer (proposed by gassmoeller; merged) https://github.com/dealii/dealii/pull/7661 #7656: Add missing headers in CUDA header file (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/7656 #7655: Disable SIMD vectorization in CUDA device code (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/7655 #7654: Generalizing GridGenerator::general_cell to tria<dim,spacedim> (proposed by GivAlz; merged) https://github.com/dealii/dealii/pull/7654 #7653: Fix more clang-tidy findings (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/7653 #7652: Mark a few Subscriptor functions as inline. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/7652 #7651: [CI] introduce clang-tidy check (proposed by tjhei) https://github.com/dealii/dealii/pull/7651 #7650: Declare VectorizedArray::n_array_elements outside the class in the general case (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/7650 #7648: [CI] test on OSX (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/7648 #7647: Explicitly use Zoltan in two tests. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/7647 #7645: Automatic transfer of active fe indices. (proposed by marcfehling) https://github.com/dealii/dealii/pull/7645 #7644: Don't use __builtin_expect in Utilities::pow (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/7644 #7643: Fix TrilinosWrappers::PreconditionMueLu (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/7643 #7641: add internal::MatrixFreeFunctions::DoFInfo::get_dof_indices() (proposed by davydden) https://github.com/dealii/dealii/pull/7641 #7640: Revert "tests: Fix mpi/periodicity_07 test" (proposed by tamiko) https://github.com/dealii/dealii/pull/7640 #7639: examples/step-1: Remove explicit reset_manifold (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/7639 #7638: Add AD::NumberType::none (proposed by jppelteret) https://github.com/dealii/dealii/pull/7638 #7637: Parse boundary_ids in GMSH-4 format correctly (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/7637 #7634: Use Trilinos functions and types for preconditioners (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/7634 #7633: Use AlignedVector in Vector. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/7633 #7583: Add "covering rtree" to GridTools::Cache (proposed by GivAlz; merged) https://github.com/dealii/dealii/pull/7583 #7509: Refactor the AD drivers classes (proposed by jppelteret; merged) https://github.com/dealii/dealii/pull/7509 #7487: Sort equality constraints for periodic bc, add two tests for make_periodicity_constraints (proposed by davydden; merged) https://github.com/dealii/dealii/pull/7487 #7368: Ginkgo wrapper for deal.ii (proposed by pratikvn; merged) https://github.com/dealii/dealii/pull/7368 #7222: QR classes for solvers (proposed by davydden; merged) https://github.com/dealii/dealii/pull/7222 ## And this is a list of recently opened or closed discussions: #7665: Incorporate AD::[get/set]_tensor_entry() into tensor classes (opened) https://github.com/dealii/dealii/issues/7665 #7664: Incorporate the functionality of AD::internal::Extractor into FEValuesExtractors/FEValuesViews (opened) https://github.com/dealii/dealii/issues/7664 #7662: Add wiki entry for info required to debug compilation issues (opened) https://github.com/dealii/dealii/issues/7662 #7660: Test output file name too long (opened) https://github.com/dealii/dealii/issues/7660 #7659: VectorTools::interpolate() fails for Trilinos MPI Vector with ghost elements. (opened) https://github.com/dealii/dealii/issues/7659 #7658: Bug in distribute_local_to_global with inhomogeneities (opened) https://github.com/dealii/dealii/issues/7658 #7657: more template inline functions in DoFInfo to improve FEEvaluation code? (opened) https://github.com/dealii/dealii/issues/7657 #7649: add GridGenerator::quarter_plate_with_a_hole() (opened) https://github.com/dealii/dealii/issues/7649 #7646: Clean up thread partitioner logic in Vector (opened) https://github.com/dealii/dealii/issues/7646 #7642: Rename the Solver class to SolverBase (opened) https://github.com/dealii/dealii/issues/7642 #7542: minimal example giving compilation error with dealii CUDA and DEAL_II_COMPILER_VECTORIZATION_LEVEL: 1 (closed) https://github.com/dealii/dealii/issues/7542 #7534: scalapack interface seems broken? (closed) https://github.com/dealii/dealii/issues/7534 #7501: Incorrect assignment of boundary indicators when reading in GMSH-4 meshes (closed) https://github.com/dealii/dealii/issues/7501 #7372: Revert 7339 (closed) https://github.com/dealii/dealii/issues/7372 #7335: Cleanup in ad_drivers.h (closed) https://github.com/dealii/dealii/issues/7335 #5624: TrilinosWrappers::MPI::Vector::reinit called with vector_writable changes behavior (closed) https://github.com/dealii/dealii/issues/5624 A list of all major changes since the last release can be found at https://www.dealii.org/developer/doxygen/deal.II/changes_after_8_5_0.html. Thanks for being part of the community! Let us know about questions, problems, bugs or just share your experience by writing to dealii@googlegroups.com, or by opening issues or pull requests at https://www.github.com/dealii/dealii. 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