Hello everyone! This is deal.II newsletter #211. 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: #13711: Fix the nodal renumbering tests. (proposed by drwells) https://github.com/dealii/dealii/pull/13711 #13710: Restrict feinterface/stokes test (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/13710 #13709: Add two asserts in NonMatching::MeshClassifier. (proposed by simonsticko; merged) https://github.com/dealii/dealii/pull/13709 #13708: Add white space to fix exception message split over several lines. (proposed by simonsticko; merged) https://github.com/dealii/dealii/pull/13708 #13707: Add more tests. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13707 #13706: Add ReferenceCell::get_midpoint_quadrature(). (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13706 #13705: Create coarse mesh out of a CGAL::Surface_mesh (proposed by fdrmrc) https://github.com/dealii/dealii/pull/13705 #13704: SolverFlexibleCG: Slightly improve documentation (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/13704 #13702: Adjust test output for new FE_RaviartThomasNodal (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/13702 #13701: Fix test failure: Close the right AffineConstraints object (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/13701 #13700: Correctly size CellData::vertices in GridTools. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/13700 #13699: Skip default values in get_coarse_mesh_description(). (proposed by drwells; merged) https://github.com/dealii/dealii/pull/13699 #13698: Add a data-locality-optimized iteration scheme to SolverCG (proposed by kronbichler) https://github.com/dealii/dealii/pull/13698 #13697: Add changelog for MappingQ (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/13697 #13696: Add GenericDoFsPerObject::generate() (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13696 #13695: Fix format of table (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13695 #13694: Generalize do_interpolate_boundary_values() for pyramid and wedge (proposed by peterrum) https://github.com/dealii/dealii/pull/13694 #13693: unit_support_points and unit_face_support_points for wedges and pyramids (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13693 #13692: Implement ReferenceCell::face_to_cell_lines() for pyramids and wedges (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13692 #13691: Rename some face batches (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13691 #13690: Improve asserts in MF/FEEval regarding FENothing (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13690 #13689: Test that exposes bug in Triangulation::create_triangulation (proposed by luca-heltai) https://github.com/dealii/dealii/pull/13689 #13688: Fix FEEvaluation::gather_evaluate() for user-defined batches (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13688 #13685: Reduce number of instantiations of FEEvaluation template factory (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/13685 #13684: Fix a recently added test (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/13684 #13683: Implement flexible variant of conjugate gradient method (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/13683 #13682: SolverCG: Switch to more common variable names (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/13682 #13681: Add LinearAlgebra::distributed::BlockVector::set_ghost_state() (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13681 #13679: Fix tests. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13679 #13678: Add ReferenceCell::volume() and ::barycenter(). (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13678 #13677: Petsc bddc preconditioner (proposed by nabw) https://github.com/dealii/dealii/pull/13677 #13676: Use simpler initialization of std::set (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/13676 #13675: Minor edits to the C++ namespace documentation. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13675 #13674: Use renumbering of DoFs for step-37 benchmark (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/13674 #13673: Upgrade write_vtu_in_parallel based on mpi large IO update (proposed by pengfej) https://github.com/dealii/dealii/pull/13673 #13672: Improve tutorial graph (proposed by drwells; merged) https://github.com/dealii/dealii/pull/13672 #13671: Hanging nodes support for matrix-free RT (proposed by NiklasWik) https://github.com/dealii/dealii/pull/13671 #13669: First try at detecting CGAL more robustly. (proposed by luca-heltai; merged) https://github.com/dealii/dealii/pull/13669 #13667: Fix some problems with renumbering with no local DoFs (proposed by drwells; merged) https://github.com/dealii/dealii/pull/13667 #13666: step-75: added link to external repository. (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/13666 #13665: Modernize c++ header (proposed by drwells; merged) https://github.com/dealii/dealii/pull/13665 #13664: Cgal surface to deal.II triangulation (proposed by fdrmrc; merged) https://github.com/dealii/dealii/pull/13664 #13663: MGConstrainedDoFs::add_boundary_indices() (proposed by zjiaqi2018; merged) https://github.com/dealii/dealii/pull/13663 #13661: Cgal triangulation (proposed by luca-heltai; merged) https://github.com/dealii/dealii/pull/13661 #13657: Add class NonMatching::FEInterfaceValues (proposed by simonsticko; merged) https://github.com/dealii/dealii/pull/13657 #13653: Add CGAL::Surface_mesh support (proposed by fdrmrc; merged) https://github.com/dealii/dealii/pull/13653 #13648: Add DataPostprocessors::BoundaryIds. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13648 #13599: Use 64-bit integer for `n_nonzero_elements`. (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/13599 #13414: Introduce free functions for consensus algorithms. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13414 ## And this is a list of recently opened or closed discussions: #13703: List of currently failing tests (opened) https://github.com/dealii/dealii/issues/13703 #13687: Behavior of `FEEvaluation::reinit()` (opened) https://github.com/dealii/dealii/issues/13687 #13686: MUMPS from Trilinos requires matrix to exist on destruction/ reinitialization (opened) https://github.com/dealii/dealii/issues/13686 #13680: Wrong assertion when creating co-dimension one quad grids. (opened) https://github.com/dealii/dealii/issues/13680 #13670: Rol::VectorAdaptor::reduce() does not perform parallel reduction (opened) https://github.com/dealii/dealii/issues/13670 #13668: Make CGAL detection robust (opened) https://github.com/dealii/dealii/issues/13668 #13555: For load balancing, should weights of cells be of type `double`? (closed) https://github.com/dealii/dealii/issues/13555 #10989: Import TaskFlow 2.7.0 (closed) https://github.com/dealii/dealii/issues/10989 #7723: Implement flexible variant of conjugate gradients (closed) https://github.com/dealii/dealii/issues/7723 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! 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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