Hello everyone! This is deal.II newsletter #203. 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: #13482: Deprecate Utilities::MPI::create_group (proposed by masterleinad) https://github.com/dealii/dealii/pull/13482 #13481: clarify docu of MatrixFree::initialize_dof_vector() (proposed by nfehn) https://github.com/dealii/dealii/pull/13481 #13479: Simplify logic in RepartitioningPolicyTools::FirstChildPolicy (proposed by peterrum) https://github.com/dealii/dealii/pull/13479 #13478: Move p:d:T::has_hanging_nodes() to DistributedTriangulationBase (proposed by peterrum) https://github.com/dealii/dealii/pull/13478 #13476: Avoid integer comparison warning. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13476 #13473: Provide a template variable that can be used to query whether T is a natively supported MPI type. (proposed by bangerth) https://github.com/dealii/dealii/pull/13473 #13472: Deal gracefully with replicating an empty array. (proposed by bangerth) https://github.com/dealii/dealii/pull/13472 #13471: Use a valid communicator. (proposed by bangerth) https://github.com/dealii/dealii/pull/13471 #13470: Check MPI error codes. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13470 #13468: quick_tests/affinity: fix warning (proposed by marcfehling) https://github.com/dealii/dealii/pull/13468 #13467: Run quick tests in GitHub Linux CI (proposed by masterleinad) https://github.com/dealii/dealii/pull/13467 #13466: Fix the TBB quick test. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/13466 #13465: Remove MPI 2.x logic (proposed by pengfej) https://github.com/dealii/dealii/pull/13465 #13464: documentation: MPI 3.0 minimum (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/13464 #13463: Minor update to FE_Nedelec. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13463 #13462: add changelog entry (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/13462 #13461: CMake: require MPI 3.0 (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/13461 #13459: Fix GC tests (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13459 #13458: [CI] run all MPI tests on Jenkins (proposed by tjhei) https://github.com/dealii/dealii/pull/13458 #13457: Improve asserts in parallel::distributed::SolutionTransfer (proposed by peterrum) https://github.com/dealii/dealii/pull/13457 #13455: add test for invert_cells_with_negative_measure (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/13455 #13454: add changelog for gmsh inverted cell fix (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/13454 #13453: Avoid a warning about comparison of differently sized integers. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13453 #13452: Provide a second error for Trilinos sparsity pattern problems. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13452 #13451: cell_weight: remove initial weight from distributed applications. (proposed by marcfehling) https://github.com/dealii/dealii/pull/13451 #13450: Fix instantiation for add_entries_local_to_global (proposed by zjiaqi2018; merged) https://github.com/dealii/dealii/pull/13450 #13449: cell_weight: not implemented for partition_zorder (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/13449 #13448: Add an assertion for p4est weights. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13448 #13446: Simplify MPI IO in parallel vtu output (proposed by pengfej; merged) https://github.com/dealii/dealii/pull/13446 #13445: Error out with too large Trilinos sparsity patterns. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13445 #13444: Allow loading Gmsh files with some cells inverted (proposed by singima; merged) https://github.com/dealii/dealii/pull/13444 #13443: Add assert to MFTools::compute_diagonal() (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13443 #13442: Minor updates to ARKode in-code commentary. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13442 #13441: Fix run time error in step-75: initialize diagonal vector (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/13441 #13439: Declare a number of static consts as constexpr (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/13439 #13438: Support SUNDIALS 6.0 and later. (proposed by bangerth) https://github.com/dealii/dealii/pull/13438 #13437: Replace present_index by index() in DoFAccessor (proposed by rezarastak; merged) https://github.com/dealii/dealii/pull/13437 #13436: Move a couple of functions out of line. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13436 #13427: Add shape function illustrations for FE_Nedelec (proposed by harmonj; merged) https://github.com/dealii/dealii/pull/13427 #13416: Fix non matching coupling (proposed by luca-heltai; merged) https://github.com/dealii/dealii/pull/13416 #13394: Add ArborXWrappers::DistributedTree (proposed by Rombur; merged) https://github.com/dealii/dealii/pull/13394 ## And this is a list of recently opened or closed discussions: #13480: Does MatrixFree::initialize_dof_vector() set vector entries to zero? (opened) https://github.com/dealii/dealii/issues/13480 #13477: Quicktests fail with Intel oneAPI suite. (opened) https://github.com/dealii/dealii/issues/13477 #13475: Remove Utilities::MPI::create_group() (opened) https://github.com/dealii/dealii/issues/13475 #13474: Remove DEAL_II_MPI_CONST_CAST (opened) https://github.com/dealii/dealii/issues/13474 #13469: invalid communicator in tests/fullydistributed_grids/repartitioning_05.cc (opened) https://github.com/dealii/dealii/issues/13469 #13460: failure in tests/base/aligned_vector_replicate_04.cc (opened) https://github.com/dealii/dealii/issues/13460 #13456: No test failure for wrong output (opened and closed) https://github.com/dealii/dealii/issues/13456 #13447: drop MPI 2.x support (opened) https://github.com/dealii/dealii/issues/13447 #13440: Step-75 broken (opened and closed) https://github.com/dealii/dealii/issues/13440 #13428: Failure when building Trilinos matrices with more than 2B entries (closed) https://github.com/dealii/dealii/issues/13428 #13412: Buggy constraints in `NonMatching` namespace (closed) https://github.com/dealii/dealii/issues/13412 #13347: GMSH quad mesh with some cells with negative weight (closed) https://github.com/dealii/dealii/issues/13347 #9901: tbb::task is deprecated (closed) https://github.com/dealii/dealii/issues/9901 #3201: Crash with a trivial mesh from gMsh (closed) https://github.com/dealii/dealii/issues/3201 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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