Hello everyone! This is deal.II newsletter #277. 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: #16745: Cleanup of SolverGMRES and SolverFGMRES implementations (proposed by kronbichler) https://github.com/dealii/dealii/pull/16745 #16744: SolverGMRES: Fix loop bound for orthogonalization (proposed by kronbichler) https://github.com/dealii/dealii/pull/16744 #16743: Leave a couple comments in FETools. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16743 #16742: PreconditionRelaxation: automatically determine omega (proposed by peterrum) https://github.com/dealii/dealii/pull/16742 #16741: In an internal function called from a virtual function, do not call virtual functions. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16741 #16740: Tensor product tests: Fix include file (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/16740 #16738: Add support for OpenCascade 7.8.0 (proposed by thierry-FreeBSD; merged) https://github.com/dealii/dealii/pull/16738 #16736: MatrixFree: Split tensor product points and single point kernels (proposed by bergbauer; merged) https://github.com/dealii/dealii/pull/16736 #16735: Rename a few variables. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16735 #16734: Implement VectorTools::interpolate_to_finer/coarser_mesh(). (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16734 #16733: Close the correct constraints objects. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16733 #16732: Add the missing variants of TpetraWrappers::SparseMatrix::set(). (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16732 #16731: Fix Tpetra SparseMatrix::add(). (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16731 #16730: Also remove the specialization structure of MGTwoLevelTransferNonNested. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16730 #16729: Address a warning. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16729 #16728: Tpetra: Fix warning in trilinos_tpetra_sparse_matrix.h (proposed by masterleinad) https://github.com/dealii/dealii/pull/16728 #16727: TrilinosWrappers::SolverDirect: adjust interface (proposed by peterrum) https://github.com/dealii/dealii/pull/16727 #16726: Also change out_stream condition when enable/disable_output (proposed by RichardYCJ) https://github.com/dealii/dealii/pull/16726 #16723: Make a specialization of MGTwoLevelTransfer the general template. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16723 #16721: Matrix-free MG transfer: Switch interpolation matrices to double type (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/16721 #16720: Add necessary header files. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16720 #16718: Fix a grammar error. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16718 #16717: Make it possible to instantiate some matrix-free stuff for std::complex data. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16717 #16716: vector_tools_interpolate.h: add a missing include (proposed by nmuch; merged) https://github.com/dealii/dealii/pull/16716 #16715: Improve an error message. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16715 #16714: Fix unintended terminate in gmsh-API version of read_msh (proposed by simonsticko) https://github.com/dealii/dealii/pull/16714 #16713: Colorize hyper rectangle with simplices (proposed by nmuch; merged) https://github.com/dealii/dealii/pull/16713 #16709: Properly deregister a particle if deleted during refinement (proposed by gassmoeller; merged) https://github.com/dealii/dealii/pull/16709 #16704: Don't create new sections during parsing (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/16704 #16700: TpetraWrappers: Implement iterators for SparseMatrix (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/16700 #16661: Add python code for plotting in Step 3 (proposed by ampdes; merged) https://github.com/dealii/dealii/pull/16661 ## And this is a list of recently opened or closed discussions: #16739: Regression tester regressed f84052 (opened and closed) https://github.com/dealii/dealii/issues/16739 #16737: deal.II does not support OpenCascade 7.8.0 (opened and closed) https://github.com/dealii/dealii/issues/16737 #16725: Add ConditionalOStream status change after initialization (opened) https://github.com/dealii/dealii/issues/16725 #16724: Regression tester regressed cae407 (opened and closed) https://github.com/dealii/dealii/issues/16724 #16722: IntelLLVM cannot handle DEAL_II_RESTRICT keyword: internal compiler error in clang fronted (opened) https://github.com/dealii/dealii/issues/16722 #16719: MG two-level/matrix-free infrastructure and std::complex data types. (opened) https://github.com/dealii/dealii/issues/16719 #16712: Step-64 crash (closed) https://github.com/dealii/dealii/issues/16712 #16684: Does MGTwoLevelTransfer work for any other vector than LinearAlgebra::distributed::Vector<Number>? (closed) https://github.com/dealii/dealii/issues/16684 #16536: Create DEAL_II_UNREACHABLE (closed) https://github.com/dealii/dealii/issues/16536 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! Let us know about questions, problems, bugs or just share your experience by writing to dealii@googlegroups.com, or by opening issues or pull requests at https://www.github.com/dealii/dealii. 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