Hello everyone! This is deal.II newsletter #359. 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: #19902: Fix GridIn::read() for abaqus input files (proposed by mschreter) https://github.com/dealii/dealii/pull/19902 #19901: Ensure internal::expand is instantiated (proposed by masterleinad) https://github.com/dealii/dealii/pull/19901 #19900: Improve error messages in FiniteElement::get_sub_fe(). (proposed by bangerth) https://github.com/dealii/dealii/pull/19900 #19899: Better document FiniteElement::get_sub_fe(). (proposed by bangerth) https://github.com/dealii/dealii/pull/19899 #19898: Fix initialization of hessians_quad_submitted in FEEvaluationData (proposed by mschreter; merged) https://github.com/dealii/dealii/pull/19898 #19897: Revert "Use set of pairs for hp_quad_dof_identities" (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19897 #19896: Fix 1D path of interpolate_boundary_values() for hp::DoFHandler (proposed by mschreter; merged) https://github.com/dealii/dealii/pull/19896 #19895: Additive Schwarz from PETSc (proposed by fdrmrc) https://github.com/dealii/dealii/pull/19895 #19894: Deprecate other now-unused parts of MeshWorker. (proposed by bangerth) https://github.com/dealii/dealii/pull/19894 #19893: Deprecate those classes that were only used in step-39. (proposed by bangerth) https://github.com/dealii/dealii/pull/19893 #19892: Better document DoFTools::extract_dofs_with_support_contained_within(). (proposed by bangerth) https://github.com/dealii/dealii/pull/19892 #19891: Support for agglomeration-based DG discretizations (proposed by fdrmrc) https://github.com/dealii/dealii/pull/19891 #19890: Document 'quad' in FiniteElement::hp_quad_dof_identities(). (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19890 #19889: Better document the Gauss-Jacobi polynomials. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19889 #19888: Arkode: fix callback documentation for ARKode and steppers (proposed by vovannikov; merged) https://github.com/dealii/dealii/pull/19888 #19887: Update Trilinos build instructions (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/19887 #19886: MatrixFree: if there is only one partitioner, then return it. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/19886 #19885: MatrixFree: make two scratch vectors small vectors. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/19885 #19884: enable affine constraints to use PETScWrappers::MPI full matrices (proposed by SanojKnalp; merged) https://github.com/dealii/dealii/pull/19884 #19883: Add an assertion. (proposed by bangerth) https://github.com/dealii/dealii/pull/19883 #19882: Only work-around HDF5 bug for sufficiently old versions. (proposed by bangerth) https://github.com/dealii/dealii/pull/19882 #19881: Add `adjust_quad_dof_index_for_face_orientation_table` for `FE_SimplexP` (proposed by dominiktassilostill) https://github.com/dealii/dealii/pull/19881 #19880: Fix vectorized_load_and_transpose for AVX/AVX-512 (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/19880 #19879: TriangulationDescription::CellData: use an inplace_vector. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/19879 #19878: MappingFE::compute_mapping_support_points(): re-use an array. (proposed by drwells) https://github.com/dealii/dealii/pull/19878 #19877: Arkode: improve robustness of tests arkode_01 and arkode_02 (proposed by vovannikov; merged) https://github.com/dealii/dealii/pull/19877 #19876: Be more consistent about the use of types::fe_index. (proposed by bangerth) https://github.com/dealii/dealii/pull/19876 #19875: KellyErrorEstimator: only compare unsigned ints with unsigned ints. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/19875 #19874: News changes minor entry for PR #18659. (proposed by gsegon; merged) https://github.com/dealii/dealii/pull/19874 #19873: Add log entry for diagonal operator. (proposed by quangx; merged) https://github.com/dealii/dealii/pull/19873 #19871: PreconditionChebyshev: Add ability to compute residual norm (proposed by kronbichler) https://github.com/dealii/dealii/pull/19871 #19870: Fix calling TpetrWrappers::vmult with dealii::Vector arguments (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/19870 #19869: Utilities::MPI: don't compress data before sending it. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/19869 #19868: Try setting CMAKE_MSVC_DEBUG_INFORMATION_FORMAT=ProgramDatabase to minimize library size with MSVC (proposed by masterleinad) https://github.com/dealii/dealii/pull/19868 #19867: Make Tpetra vector element operations thread-safe (proposed by gassmoeller; merged) https://github.com/dealii/dealii/pull/19867 #19866: [WIP] Remove IC preconditioner from tests if unavailable (proposed by gassmoeller) https://github.com/dealii/dealii/pull/19866 #19865: Arkode: tighten tolerances for tests 07, 08 and erkstep (proposed by vovannikov; merged) https://github.com/dealii/dealii/pull/19865 #19864: Simplify TimeStepping with std::unique_ptr and initializer lists (proposed by JR-Khan; merged) https://github.com/dealii/dealii/pull/19864 #19863: Remove dependence of step-39 on old MeshWorker classes. (proposed by bangerth) https://github.com/dealii/dealii/pull/19863 #19862: Arkode: rethrow recoverable error after SundialsOperator::vmult() and SundialsPreconditioner::vmult() (proposed by vovannikov; merged) https://github.com/dealii/dealii/pull/19862 #19861: Rename a few variables into n_lanes. Remove unneeded ones (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/19861 #19860: KellyErrorEstimator: avoid allocating a scratch vector. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/19860 #19859: make_hanging_node_constraints(): avoid setting up a std::set. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/19859 #19858: Replace PreconditionIC in step-43 if unavailable (proposed by gassmoeller) https://github.com/dealii/dealii/pull/19858 #19857: Replace PreconditionerIC in step 31 for Tpetra (proposed by gassmoeller; merged) https://github.com/dealii/dealii/pull/19857 #19856: Guard AMG parameter only available for Epetra ML (proposed by gassmoeller; merged) https://github.com/dealii/dealii/pull/19856 #19855: Arkode: introduce the default eigenvalue estimator for LSRKStepperSTS (proposed by vovannikov; merged) https://github.com/dealii/dealii/pull/19855 #19854: Add missing empty lines in header (proposed by gassmoeller; merged) https://github.com/dealii/dealii/pull/19854 #19853: Add missing compress() calls in example programs (proposed by gassmoeller; merged) https://github.com/dealii/dealii/pull/19853 #19852: Provide MueLu if ML is not available (proposed by gassmoeller; merged) https://github.com/dealii/dealii/pull/19852 #19851: Simplify MeshWorkers::Assemblers::CellsAndFaces. (proposed by bangerth) https://github.com/dealii/dealii/pull/19851 #19850: Deprecate MeshWorker::Functional. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19850 #19849: Link namespace TimeSteppers to other resources. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19849 #19848: Deprecate the classes in namespace Algorithms. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19848 #19847: Remove incompatibilities between mpc and mpich (proposed by luca-heltai; merged) https://github.com/dealii/dealii/pull/19847 #19846: SolutionTransfer: add a scratch array for packing data. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/19846 #19844: Only keep Tpetra vector view as long as necessary (proposed by gassmoeller; merged) https://github.com/dealii/dealii/pull/19844 #19843: fix latex formula issues (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/19843 #19839: Avoid some static variables. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/19839 #19837: Specialize vectorized_load_and_transpose for remainder cases 1,2,3 (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/19837 #19836: Arkode: Improve robustness of ARKode tests 06-10 and compat_interfaces (proposed by vovannikov; merged) https://github.com/dealii/dealii/pull/19836 #19827: Evaluation kernels hanging nodes docu (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/19827 #19826: Use a single implementation for vectorized transpose functions (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/19826 #19784: Base & Tests: Implement and verify fixed-step and embedded Tsitouras 5(4) (proposed by JR-Khan; merged) https://github.com/dealii/dealii/pull/19784 #19706: Add a diagonal operator. (proposed by quangx; merged) https://github.com/dealii/dealii/pull/19706 #19662: Nodal basis for simplices (proposed by dominiktassilostill; merged) https://github.com/dealii/dealii/pull/19662 #19291: Keep order of fe indices when determining hp dof identities (proposed by dominiktassilostill; merged) https://github.com/dealii/dealii/pull/19291 #19016: write CF/UGRID output (proposed by dabele; merged) https://github.com/dealii/dealii/pull/19016 #17578: Arbitrary order quadrature on pyramids (proposed by dominiktassilostill; merged) https://github.com/dealii/dealii/pull/17578 ## And this is a list of recently opened or closed discussions: #19872: get_sub_fe() throws with FESystems whose sub-FE were not explicitly created as FESystem (opened and closed) https://github.com/dealii/dealii/issues/19872 #19842: Deprecate everything in namespace Algorithms. (closed) https://github.com/dealii/dealii/issues/19842 #19818: Improve code structure of time integrators: Use array assignment. (closed) https://github.com/dealii/dealii/issues/19818 #19817: Improve code structure of time integrators: Use std::unique_ptr over plain pointer. (closed) https://github.com/dealii/dealii/issues/19817 #19814: SUNDIALS test failures (closed) https://github.com/dealii/dealii/issues/19814 #19799: Compilation issues with locally built deal.II and PETSc (closed) https://github.com/dealii/dealii/issues/19799 #19781: matrix_free/evaluation_kernels_hanging_nodes.h: Improve documentation (closed) https://github.com/dealii/dealii/issues/19781 #19700: Regression tester regressed 3770e0 (closed) https://github.com/dealii/dealii/issues/19700 #19650: General status of simplex support (closed) https://github.com/dealii/dealii/issues/19650 #19610: sundials/invocation_context.h is missing an include. (closed) https://github.com/dealii/dealii/issues/19610 #18903: Netcdf/CF/Ugrid output (closed) https://github.com/dealii/dealii/issues/18903 #18834: Change auto-generated labels in tutorials. (closed) https://github.com/dealii/dealii/issues/18834 #18676: xref validation (closed) https://github.com/dealii/dealii/issues/18676 #17836: tutorial step-92: "parallel handling of complicated meshes" (closed) https://github.com/dealii/dealii/issues/17836 #17719: Make DoFRenumbering::component_wise() work with FEValuesExtractors. (closed) https://github.com/dealii/dealii/issues/17719 #15624: LinearAlgebra::{E,T}petraWrappers::Vector::compress() doesn't do anything. (closed) https://github.com/dealii/dealii/issues/15624 #15519: Testsuite: improve test timings (closed) https://github.com/dealii/dealii/issues/15519 #15476: Testsuite: don't print exc.what() in tests (closed) https://github.com/dealii/dealii/issues/15476 #15395: Testsuite: tests should not output and compare initial and final residuals (closed) https://github.com/dealii/dealii/issues/15395 #13949: Optimize compilation units and object libraries: investigate sizes, minimize includes, minimize compilation times, enforce DAG (closed) https://github.com/dealii/dealii/issues/13949 #6045: Link the TimeStepping classes to the tutorials. (closed) https://github.com/dealii/dealii/issues/6045 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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