Hello everyone! This is deal.II newsletter #42. 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: #7013: Move cuda kernels to their own file and namespace (proposed by Rombur) https://github.com/dealii/dealii/pull/7013 #7012: Allow merging multiple Triangulation objects at once (proposed by masterleinad) https://github.com/dealii/dealii/pull/7012 #7011: Improve documentation of Triangulation (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/7011 #7010: More fixes to AD drivers classes (proposed by jppelteret; merged) https://github.com/dealii/dealii/pull/7010 #7006: Add vtk output of curved mesh (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/7006 #7004: Document new VTK extensions and restrictions. (proposed by bangerth) https://github.com/dealii/dealii/pull/7004 #7003: Restrict wave_number in constructor of Bessel1 to nonnegative values (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/7003 #7002: Applies variable size transfer to 'ParticleHandler'. (proposed by marcfehling) https://github.com/dealii/dealii/pull/7002 #7001: Adding global tree of bounding boxes (proposed by GivAlz) https://github.com/dealii/dealii/pull/7001 #7000: Mark some variables as const in the high order VTK output (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/7000 #6998: Improve deprecation messages (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/6998 #6997: Fix various warnings (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/6997 #6996: Use a C++17 function instead of jn. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/6996 #6995: Cleanup 'attach_data_02.output'. (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/6995 #6994: Add support for high-order VTK output (proposed by agrayver; merged) https://github.com/dealii/dealii/pull/6994 #6989: Fix reference to step-18 in documentation (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/6989 #6988: add test for examples/step-56 (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/6988 #6987: Avoid warning in mpi/attach_data_02 (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/6987 #6986: Rename petsc_parallel_* headers to petsc_* (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/6986 #6985: Deprecate project_boundary_values_curl_conforming (proposed by agrayver; merged) https://github.com/dealii/dealii/pull/6985 #6984: add a FiniteSizeHistory class to store objects (proposed by davydden) https://github.com/dealii/dealii/pull/6984 #6983: Implement variable size serialization. (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/6983 #6981: AD Helpers: Add helper for vector functions (QP-level) (proposed by jppelteret) https://github.com/dealii/dealii/pull/6981 #6980: AD Helpers: Add helper for scalar functions (QP-level) (proposed by jppelteret) https://github.com/dealii/dealii/pull/6980 #6979: AD Helpers: Introduce base class for QP-level helper classes (proposed by jppelteret) https://github.com/dealii/dealii/pull/6979 #6978: AD Helpers: Add helper for residual linearisation (cell-level) (proposed by jppelteret) https://github.com/dealii/dealii/pull/6978 #6977: AD Helpers: Add helper for variational formulations (cell-level) (proposed by jppelteret) https://github.com/dealii/dealii/pull/6977 #6976: AD Helpers: Introduce base class for cell-level AD helper classes (proposed by jppelteret) https://github.com/dealii/dealii/pull/6976 #6975: AD Helpers: Introduce base class for AD helper classes (proposed by jppelteret) https://github.com/dealii/dealii/pull/6975 #6974: example/step-15: Update indenting and modernize (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/6974 #6973: CMake: Do not check for the geometry component in FindBOOST.cmake (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/6973 #6971: Improved description compute point locations (proposed by GivAlz; merged) https://github.com/dealii/dealii/pull/6971 #6968: Save the locally owned rows in TrilinosWrappers::SparsityPattern (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/6968 #6967: Boost bounding box (proposed by luca-heltai; merged) https://github.com/dealii/dealii/pull/6967 #6960: Prevent warnings introduced in #6936. (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/6960 #6957: Update the documentation of GridTools::extract_used_vertices(). (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/6957 #6955: Avoid warning regarding unused variable in SolutionTransfer::unpack_callback (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/6955 #6924: Add shells (proposed by drwells; merged) https://github.com/dealii/dealii/pull/6924 #6861: Fix bug in FEFaceEvaluation in 1D (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/6861 #6328: Make Subscriptor thread-safe & add general list_subscribers() function. (proposed by jppelteret; merged) https://github.com/dealii/dealii/pull/6328 #5499: Implement driver interface for internally supported AD libraries. (proposed by jppelteret; merged) https://github.com/dealii/dealii/pull/5499 ## And this is a list of recently opened or closed discussions: #7009: cell_vectorization_category on GMG (opened) https://github.com/dealii/dealii/issues/7009 #7008: Use kdtree in find_active_cell_around_point() ? (opened and closed) https://github.com/dealii/dealii/issues/7008 #7007: GridGenerator::merge_triangulations with more than 2 triangulations to merge (opened) https://github.com/dealii/dealii/issues/7007 #7005: add GridGenerator for matrix-inclusion (opened) https://github.com/dealii/dealii/issues/7005 #6999: Address comments in #6994 (opened and closed) https://github.com/dealii/dealii/issues/6999 #6993: Compiler Warnings during Built with OpenMPI 3.1.1 (opened) https://github.com/dealii/dealii/issues/6993 #6992: Import a function that refines a mesh to track a manifold to a prescribed accuracy (opened) https://github.com/dealii/dealii/issues/6992 #6991: Introduce CachedManifold (opened) https://github.com/dealii/dealii/issues/6991 #6990: Address comments in #5499 (opened and closed) https://github.com/dealii/dealii/issues/6990 #6969: CMake (any version): No header defined for geometry; skipping header check (closed) https://github.com/dealii/dealii/issues/6969 #6919: Cannot debug with `gdb` in WSL when `MPI_InitFinalize` is called (closed) https://github.com/dealii/dealii/issues/6919 #6918: Allow querying TrilinosWrappers::SparsityPattern for locally owned rows (closed) https://github.com/dealii/dealii/issues/6918 #6891: Add additional shells to hyper_cube_with_cylindrical_hole. (closed) https://github.com/dealii/dealii/issues/6891 #6353: Replace bessel function with something in boost (closed) https://github.com/dealii/dealii/issues/6353 #6314: Can we make Subscriptor::list_subscribers work with threads? (closed) https://github.com/dealii/dealii/issues/6314 #4468: Rearrange PETSc and Trilinos headers (closed) https://github.com/dealii/dealii/issues/4468 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 [email protected], or by opening issues or pull requests at https://www.github.com/dealii/dealii. 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