Hello everyone! This is deal.II newsletter #94. 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: #8817: instantiate CellData for dim=0 (proposed by tjhei) https://github.com/dealii/dealii/pull/8817 #8816: instantiate uninitialized tensor struct (proposed by tjhei) https://github.com/dealii/dealii/pull/8816 #8815: instantiate TensorProductPolynomials for dim=0 (proposed by tjhei) https://github.com/dealii/dealii/pull/8815 #8813: Process indices in ComputeIndexOwner by intervals (proposed by kronbichler) https://github.com/dealii/dealii/pull/8813 #8812: Make TensorProductQuadrature a separate class. (proposed by simonsticko) https://github.com/dealii/dealii/pull/8812 #8811: Avoid sorting a large array in MG fill_copy_indices (proposed by kronbichler) https://github.com/dealii/dealii/pull/8811 #8810: Change the storage type of MG copy indices to table (proposed by kronbichler) https://github.com/dealii/dealii/pull/8810 #8809: Fix data type in p:f:CellData (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/8809 #8808: Update number_cache.n_locally_owned_active_cells need based (proposed by peterrum) https://github.com/dealii/dealii/pull/8808 #8807: Avoid calling the constructor for emplace_back (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/8807 #8806: Move comparator of CellData and ConstructionData out of the tests (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/8806 #8805: Better document parallel::TriangulationBase. (proposed by bangerth) https://github.com/dealii/dealii/pull/8805 #8804: Remove TimeStepControl::format altogether. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/8804 #8803: Fix a typo. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/8803 #8802: Some bug fixed in p:f:t [WIP] (proposed by peterrum) https://github.com/dealii/dealii/pull/8802 #8800: Speed up IndexSet::add_indices() (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/8800 #8799: Speed up MGTools::make_boundary_list() (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/8799 #8798: Fix warning (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/8798 #8797: Allow multigrid transfer to use external vector partitioners (proposed by kronbichler) https://github.com/dealii/dealii/pull/8797 #8796: fixed the usage of deprecated std::uncaught_exception (proposed by rezarastak; merged) https://github.com/dealii/dealii/pull/8796 #8795: Make a char[30] variable into a std::string. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/8795 #8794: Avoid dangling pointer in initializer_list (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/8794 #8792: Remove obsolete global communication from MGTransfer (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/8792 #8790: remove warning in fully_distributed_tria_util (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/8790 #8789: enum Strategy is removed from TimestepControl (proposed by rezarastak; merged) https://github.com/dealii/dealii/pull/8789 #8788: Add a test for FEInterfaceValues (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/8788 #8787: Allow the two cell iterators given to FEInterfaceValues to be of different type. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/8787 #8784: Remove an auto from a lambda in pft (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/8784 #8783: Clean up compute_vertices_with_ghost_neighbors [WIP] (proposed by peterrum) https://github.com/dealii/dealii/pull/8783 #8782: Redefine TimestepControl::tolerance() (proposed by rezarastak) https://github.com/dealii/dealii/pull/8782 #8779: Fix compiling with clang (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/8779 #8777: Remove doc stating FECollection is unused in hp::FE*Values classes. (proposed by simonsticko; merged) https://github.com/dealii/dealii/pull/8777 #8775: Replace set with vector in pft:util (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/8775 #8774: Hdf5 documentation (proposed by jpthiele) https://github.com/dealii/dealii/pull/8774 #8773: Add function MappingCartesian::fill_jacobian_derivatives(..) (proposed by simonsticko; merged) https://github.com/dealii/dealii/pull/8773 #8772: Eliminate MPI all-to-all communication in MPI::Partitioner (proposed by kronbichler) https://github.com/dealii/dealii/pull/8772 #8770: Document DataPostprocessor for the case of complex-valued solutions. (proposed by bangerth) https://github.com/dealii/dealii/pull/8770 #8769: Make DataPostprocessor work for complex-valued vector-valued problems. (proposed by bangerth) https://github.com/dealii/dealii/pull/8769 #8767: Remove default constructor for classes derived from Function<dim> if empty. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/8767 #8766: Provide some explanation on 'virtual' and 'override'. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/8766 #8765: Avoid warnings as a result of an unused variable. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/8765 #8763: Update small pieces in TimestepControl. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/8763 #8762: Full documentation provided to members of TimestepControl (proposed by rezarastak; merged) https://github.com/dealii/dealii/pull/8762 #8761: Change TensorProductPolynomialsConst from "is-a" to "has-a" TensorProductPolynomials (proposed by GrahamBenHarper; merged) https://github.com/dealii/dealii/pull/8761 #8760: fixed inconsistent state in TimestepControl (proposed by rezarastak; merged) https://github.com/dealii/dealii/pull/8760 #8759: improve check for CAN_CALL_NONCONSTEXPR (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/8759 #8756: Fix a few typos in changelogs (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/8756 #8754: Disable compression in ghost exchange of DoFHandler (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/8754 #8753: Add random particle generator (proposed by gassmoeller; merged) https://github.com/dealii/dealii/pull/8753 #8752: Augment the documentation of the Particle class. (proposed by bangerth) https://github.com/dealii/dealii/pull/8752 #8751: Move operator== from a test to the CellData class itself. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/8751 #8749: Improve performance of DoFHandler::distribute_mg_dofs (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/8749 #8748: Add boost serialization for ConstructionData (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/8748 #8747: Change gzip compression level to best_speed (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/8747 #8745: Update the documentation of the MeshWorker::LocalResults class. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/8745 #8742: Change TensorProductPolynomialsBubbles from "is-a" to "has-a" TensorProductPolynomials (proposed by GrahamBenHarper; merged) https://github.com/dealii/dealii/pull/8742 #8741: Updates to the step-65 documentation. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/8741 #8730: add interface for user defined GMG constraints (proposed by tcclevenger; merged) https://github.com/dealii/dealii/pull/8730 #8726: Simplify matrix_free/parallel_multigrid_adaptive_03 test (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/8726 #8723: Change TensorProductPolynomials and AnisotropicPolynomials to derive from ScalarPolynomialsBase (proposed by GrahamBenHarper; merged) https://github.com/dealii/dealii/pull/8723 #8709: Add maxwell singularity test (proposed by dangars; merged) https://github.com/dealii/dealii/pull/8709 #8660: introduce FEInterfaceValues (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/8660 #8654: Added GridGenerator::generate_from_name_and_arguments (proposed by luca-heltai; merged) https://github.com/dealii/dealii/pull/8654 #8622: Introduce new parallel::fullydistributed::Triangulation (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/8622 ## And this is a list of recently opened or closed discussions: #8814: Function<dim> default constructor in examples and intel compiler (opened) https://github.com/dealii/dealii/issues/8814 #8801: Definition of subdomain_id() on serial triangulation (opened) https://github.com/dealii/dealii/issues/8801 #8793: std::uncaught_exception() is deprecated in c++17 (opened and closed) https://github.com/dealii/dealii/issues/8793 #8791: undefined references linker errors with intel 19.0.5 (opened) https://github.com/dealii/dealii/issues/8791 #8786: Bug with face orientations in FEInterfaceValues (opened and closed) https://github.com/dealii/dealii/issues/8786 #8785: Speed up ComputeIndexOwner::Dictionary (opened) https://github.com/dealii/dealii/issues/8785 #8781: AssertIsFinite for Sacado AD type (opened) https://github.com/dealii/dealii/issues/8781 #8780: Casting unsigned integer to Sacado AD types during Vector instantiation (opened) https://github.com/dealii/dealii/issues/8780 #8778: Remove parallel::TriangulationBase::NumberCache::n_locally_owned_active_cells (opened) https://github.com/dealii/dealii/issues/8778 #8776: Update `FE_BernardiRaugel` to use physical normal vectors and not reference normal vectors (opened) https://github.com/dealii/dealii/issues/8776 #8771: Definition of TimestepControl::tolerance (opened) https://github.com/dealii/dealii/issues/8771 #8768: Touch up TensorProductPolynomials classes (opened) https://github.com/dealii/dealii/issues/8768 #8764: Algorithms::TimestepControl has security problem (opened and closed) https://github.com/dealii/dealii/issues/8764 #8758: intel 19.0.5 DEAL_II_HAVE_CXX14_CONSTEXPR_CAN_CALL_NONCONSTEXPR bug (opened and closed) https://github.com/dealii/dealii/issues/8758 #8757: intel 19.0.5 always inline warning (opened) https://github.com/dealii/dealii/issues/8757 #8755: intel 19.0.5 tuple compile error (opened) https://github.com/dealii/dealii/issues/8755 #8696: Step-4 documentation: Explanation of keywords virtual & override in RHS/BC template functions (closed) https://github.com/dealii/dealii/issues/8696 #8682: Rename AnisotropicPolynomials::compute() to evaluate() (closed) https://github.com/dealii/dealii/issues/8682 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. 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