Hello everyone! This is deal.II newsletter #360. 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: #19936: Choose more efficient way of asking whether a vector is zero. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19936 #19935: PETSc + Bicgstab: use a wider range of tolerances. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/19935 #19934: Bump actions/checkout from 6 to 7 (proposed by dependabot[bot]; merged) https://github.com/dealii/dealii/pull/19934 #19933: Simplify interface to vector access with hanging node constraints (proposed by kronbichler) https://github.com/dealii/dealii/pull/19933 #19931: Make step-90 compatible with TpetraWrappers (proposed by gassmoeller; merged) https://github.com/dealii/dealii/pull/19931 #19930: CI: fix gmsh version parsing. (proposed by drwells) https://github.com/dealii/dealii/pull/19930 #19929: Make a Tpetra vector function const (proposed by gassmoeller; merged) https://github.com/dealii/dealii/pull/19929 #19928: Space two pictures in the documentation of DataPostprocessorTensor. (proposed by bangerth) https://github.com/dealii/dealii/pull/19928 #19927: Unify the CG solver classes used in step-45 and step-32 (proposed by gassmoeller; merged) https://github.com/dealii/dealii/pull/19927 #19926: adolc: bypass a check so we throw an exception. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/19926 #19925: Add changelog entry (proposed by iprusak; merged) https://github.com/dealii/dealii/pull/19925 #19924: Clarify some code comments. (proposed by bangerth) https://github.com/dealii/dealii/pull/19924 #19923: Don't mark member functions in source files as inline. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/19923 #19922: Don't mark functions in anonymous spaces as inline. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/19922 #19921: Use `ScalarLagrangePolynomialSimplex` in `FE_SimplexP` (proposed by dominiktassilostill) https://github.com/dealii/dealii/pull/19921 #19920: Make some variables const in `quadrature_lib.cc` (proposed by dominiktassilostill; merged) https://github.com/dealii/dealii/pull/19920 #19919: Fix dofs support contained within with constraints (proposed by tnschmid; merged) https://github.com/dealii/dealii/pull/19919 #19917: Make CGAL detection robust. (proposed by luca-heltai; merged) https://github.com/dealii/dealii/pull/19917 #19916: Add a pull request template with an AI disclosure statement (proposed by blaisb) https://github.com/dealii/dealii/pull/19916 #19915: Add to the documentation of quadrature classes. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19915 #19914: InitFinalize: handle GMSH. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/19914 #19913: Re-apply #19291. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19913 #19912: step-39: update the perl script. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/19912 #19911: CI: print the largest files in the Windows build directory. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/19911 #19910: MatrixCreator: use type erasure. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/19910 #19909: MatrixCreator: consolidate the assemblers. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/19909 #19908: DerivativeApproximation: use type erasure. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/19908 #19904: Arkode: introduce SplittingStepper (proposed by vovannikov) https://github.com/dealii/dealii/pull/19904 #19900: Improve error messages in FiniteElement::get_sub_fe(). (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19900 #19899: Better document FiniteElement::get_sub_fe(). (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19899 #19894: Deprecate other now-unused parts of MeshWorker. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19894 #19893: Deprecate those classes that were only used in step-39. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19893 #19892: Better document DoFTools::extract_dofs_with_support_contained_within(). (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19892 #19882: Only work-around HDF5 bug for sufficiently old versions. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19882 #19878: MappingFE::compute_mapping_support_points(): re-use an array. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/19878 #19863: Remove dependence of step-39 on old MeshWorker classes. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19863 #19841: Add constant mode extraction to Tpetra MueLu (proposed by gassmoeller; merged) https://github.com/dealii/dealii/pull/19841 #19708: Fix support contained within without constraints (proposed by tnschmid; merged) https://github.com/dealii/dealii/pull/19708 #19630: VTKWrappers utilities -- part XI -- vtk <-> tria + manifold/boundary/material (proposed by luca-heltai; merged) https://github.com/dealii/dealii/pull/19630 #19614: High order simplex quadrature (proposed by dominiktassilostill; merged) https://github.com/dealii/dealii/pull/19614 #19347: Add Portable::MGTwoLevelTransfer (proposed by iprusak; merged) https://github.com/dealii/dealii/pull/19347 #19264: Hp dof identities for simplices, wedges and pyramids (proposed by dominiktassilostill; merged) https://github.com/dealii/dealii/pull/19264 #18178: Power iteration: check norm of initial vector (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/18178 #16537: Precompute weights for parallel::CellWeights. (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/16537 ## And this is a list of recently opened or closed discussions: #19932: Compatibility of deal.II examples with Trilinos 17/Tpetrawrappers (opened) https://github.com/dealii/dealii/issues/19932 #19918: Improve setup costs of TwoLevelTransfer::reinit_geometric_transfer (opened) https://github.com/dealii/dealii/issues/19918 #19903: Re-apply #19291. (opened and closed) https://github.com/dealii/dealii/issues/19903 #19782: PreconditionChebyshev::vmult should not pick up state of `dst` vector (closed) https://github.com/dealii/dealii/issues/19782 #19777: Regression tester regressed d681af (closed) https://github.com/dealii/dealii/issues/19777 #19741: Regression tester regressed cbe48e (closed) https://github.com/dealii/dealii/issues/19741 #19696: extract_dofs_with_support_contained_within() returns wrong results in parallel (closed) https://github.com/dealii/dealii/issues/19696 #19645: Regression tester regressed 6cb533 (closed) https://github.com/dealii/dealii/issues/19645 #19608: Regression tester regressed 1a2ab6 (closed) https://github.com/dealii/dealii/issues/19608 #19574: Regression tester regressed f112b1 (closed) https://github.com/dealii/dealii/issues/19574 #19521: Guard HDF5 initialization to avoid FP exceptions in tests.h with HDF5 version number. (closed) https://github.com/dealii/dealii/issues/19521 #19515: Regression tester regressed dc205d (closed) https://github.com/dealii/dealii/issues/19515 #19447: How to write into non-locally-owned entries of fully distributed TpetraWrappers::Vectors. (closed) https://github.com/dealii/dealii/issues/19447 #19441: Regression tester regressed 40b6df (closed) https://github.com/dealii/dealii/issues/19441 #17696: Deprecate IntegrationInfo and IntegrationInfoBox. (closed) https://github.com/dealii/dealii/issues/17696 #15946: CMake: use pkgconfig information when available (closed) https://github.com/dealii/dealii/issues/15946 #15839: Remove MeshWorker framework (closed) https://github.com/dealii/dealii/issues/15839 #13668: Make CGAL detection robust (closed) https://github.com/dealii/dealii/issues/13668 #10474: DataOut::add_data_vector vector handling (closed) https://github.com/dealii/dealii/issues/10474 #9867: Use tensor product evaluation for MappingQGeneric::fill_fe_face_values (closed) https://github.com/dealii/dealii/issues/9867 #3845: Allow more element types in MGTransferMatrixFree (closed) https://github.com/dealii/dealii/issues/3845 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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