Hello everyone! This is deal.II newsletter #95. 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: #8876: Fix setting host compiler (proposed by masterleinad) https://github.com/dealii/dealii/pull/8876 #8875: Bypass vector copy in MatrixFree::cell_loop with MPI (proposed by kronbichler) https://github.com/dealii/dealii/pull/8875 #8874: Fix some clang-tidy 9 findings (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/8874 #8872: Update the GPU matrix-free documentation (2) [WIP] (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/8872 #8871: Update step-64 (proposed by peterrum) https://github.com/dealii/dealii/pull/8871 #8870: Require mpirun when requesting p4est in tests (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/8870 #8869: Update the description of the Nedelec element. (proposed by bangerth) https://github.com/dealii/dealii/pull/8869 #8868: Enable assert again (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/8868 #8867: Add changelog for #8861 (proposed by dougshidong; merged) https://github.com/dealii/dealii/pull/8867 #8866: Fix some clang-tidy 9 findings (proposed by masterleinad) https://github.com/dealii/dealii/pull/8866 #8865: Fix failing CUDA tests (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/8865 #8864: Change 'direction' of make_periodicity_constraint() to 'unsigned int'. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/8864 #8863: Add missing test output (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/8863 #8862: Fix a bug introduced in #8783 (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/8862 #8861: Fix Manifold get_new_point() (proposed by dougshidong; merged) https://github.com/dealii/dealii/pull/8861 #8860: Fix SolutionTransfer when coarsening from FE_Nothing (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/8860 #8859: Document direction parameter for periodic constraints (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/8859 #8858: add MatrixFree::get_cell_level_and_index() (proposed by jwitte08; merged) https://github.com/dealii/dealii/pull/8858 #8857: Extend TensorProductMatrixSymmetricSum (proposed by jwitte08; merged) https://github.com/dealii/dealii/pull/8857 #8856: Store Mapping in MatrixFree's MappingInfo (proposed by jwitte08; merged) https://github.com/dealii/dealii/pull/8856 #8855: Store 1D quadrature in ShapeInfo (proposed by jwitte08; merged) https://github.com/dealii/dealii/pull/8855 #8854: Compute shape_gradients/hessians_collocation in ShapeInfo (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/8854 #8853: Modify method accessibility in ShapeInfo (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/8853 #8851: Restructure matrix_free/cuda_tensor_product_kernels.h [WIP] (proposed by peterrum) https://github.com/dealii/dealii/pull/8851 #8849: Make p:f:t:Utilities visible in Doxygen (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/8849 #8848: fix gcc 4.9 warning (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/8848 #8847: kinematics.h: fix always_inline (proposed by tjhei) https://github.com/dealii/dealii/pull/8847 #8846: Avoid dynamic_cast in ghost/artificial cell queries (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/8846 #8845: intel: disable const initializer warning (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/8845 #8844: Rewrite the introduction to the RT element. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/8844 #8843: Add test for MappingFEField (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/8843 #8842: Clean up more changelog entries. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/8842 #8841: fix documentation in DerivativeApproximation (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/8841 #8840: Initialize n_colors in CUDAWrappers::MatrixFree::AdditionalData (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/8840 #8839: Merge computation of values and gradients in the matrixfree CUDA code (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/8839 #8838: Eliminate q_point from functor and other GPU functions (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/8838 #8837: Update the GPU matrix-free documentation (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/8837 #8836: Inline functions because of bugs in hipcc (proposed by Rombur; merged) https://github.com/dealii/dealii/pull/8836 #8835: Fix boost problems with MSVC (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/8835 #8834: Add coarsening/refinement capabilities to p:f:t [WIP] (proposed by peterrum) https://github.com/dealii/dealii/pull/8834 #8833: Instantiate ConsensusAlgorithmSelector (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/8833 #8832: Remove std::bind from include (apart from documentation) (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/8832 #8831: Improve some changelog entries. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/8831 #8830: Collate changelog entries (proposed by drwells; merged) https://github.com/dealii/dealii/pull/8830 #8829: add to documentation of get_coarse_mesh_description() (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/8829 #8828: Assertion checks the wrong item size. (proposed by dougshidong; merged) https://github.com/dealii/dealii/pull/8828 #8827: Improve GridGenerator documentation in a few places. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/8827 #8825: Remove std::bind from source (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/8825 #8823: Remove colon after @note. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/8823 #8822: Better document parallel::DistributedTriangulationBase. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/8822 #8821: Improve coding conventions (proposed by drwells; merged) https://github.com/dealii/dealii/pull/8821 #8818: Remove std::bind from hp (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/8818 #8817: Do not instantiate CellData for dim=0 (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/8817 #8815: instantiate TensorProductPolynomials for dim=0 (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/8815 #8810: Change the storage type of MG copy indices to table (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/8810 #8805: Better document parallel::TriangulationBase. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/8805 #8802: Some bug fixed in p:f:t (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/8802 #8783: Clean up compute_vertices_with_ghost_neighbors (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/8783 #8772: Eliminate MPI all-to-all communication in MPI::Partitioner (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/8772 #8770: Document DataPostprocessor for the case of complex-valued solutions. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/8770 #8769: Make DataPostprocessor work for complex-valued vector-valued problems. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/8769 #8750: Create p:f:ConstructionData by a selected group of processes (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/8750 #8739: add functions to access svd u and vt variables (proposed by MFraters; merged) https://github.com/dealii/dealii/pull/8739 #8728: Embed vector operations in MatrixFree cell loops (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/8728 #8713: Put implementation details of FEFaceEvaluation into separate file (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/8713 ## And this is a list of recently opened or closed discussions: #8873: CMake configuration with CUDA/MPI code (opened) https://github.com/dealii/dealii/issues/8873 #8852: Performance tests (opened) https://github.com/dealii/dealii/issues/8852 #8850: Disagreement between MappingQ and MappingFEField using find_all_active_cells_around_point (opened) https://github.com/dealii/dealii/issues/8850 #8826: Does MGMatrixSimple fill in edge_out and edge_in correctly? (opened) https://github.com/dealii/dealii/issues/8826 #8820: Better document 'direction' of DoFTools::make_periodicity_constraints (opened and closed) https://github.com/dealii/dealii/issues/8820 #8814: Function<dim> default constructor in examples and intel compiler (closed) https://github.com/dealii/dealii/issues/8814 #8801: Definition of subdomain_id() on serial triangulation (closed) https://github.com/dealii/dealii/issues/8801 #8791: undefined references linker errors with intel 19.0.5 (closed) https://github.com/dealii/dealii/issues/8791 #8734: Treat periodic neighbors correctly in compute_vertices_with_ghost_neighbors (closed) https://github.com/dealii/dealii/issues/8734 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! 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