Hello everyone! This is deal.II newsletter #200. 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: #13344: Fix boundary IDs for `pipe_junction`. (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/13344 #13343: Add MGSmootherPrecondition::initialize_matrices() (proposed by peterrum) https://github.com/dealii/dealii/pull/13343 #13342: Fix name of change-log entry (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13342 #13341: Make FEEval more consistent with FEValues (proposed by peterrum) https://github.com/dealii/dealii/pull/13341 #13340: Fix assert message for empty vector (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13340 #13339: Save a few cycles for single-character output. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13339 #13338: correcting some notations (proposed by pengfej; merged) https://github.com/dealii/dealii/pull/13338 #13337: Fix deduction matrix free (proposed by drwells; merged) https://github.com/dealii/dealii/pull/13337 #13336: VTU: put closing XML on separate line (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/13336 #13335: SolverControl: make constructors explicit (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/13335 #13334: documentation fixes (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/13334 #13333: PreconditionIdentity: move implementation out of declaration (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/13333 #13332: fix a formula (proposed by zjiaqi2018; merged) https://github.com/dealii/dealii/pull/13332 #13331: remove two wrong file comments (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/13331 #13330: remove forward declarations of MappingQ (proposed by nfehn; merged) https://github.com/dealii/dealii/pull/13330 #13328: Add MatrixFree::initialize_cell_data_vector() (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13328 #13327: FEEval::reinit(std::array): use MappingDataOnTheFly (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13327 #13326: Use the new CA interface instead of using AnonymousProcess. (proposed by bangerth) https://github.com/dealii/dealii/pull/13326 #13325: CMake: Modernize DEAL_II_PACKAGE_HANDLE macro and clean up Find*.cmake files (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/13325 #13324: Fix warning regarding unused parameter (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/13324 #13323: Micro simplication. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13323 #13322: Deal with empty function objects in CA algorithms. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13322 #13320: Replace is_detected (type) by is_supported_operation (variable). (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13320 #13319: CMake: call CMake's FindHDF5 instead of trying to find everything by hand (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/13319 #13316: MatrixFreeTools::compute_diagonal(): do not initialize vector (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13316 #13315: `MatrixFreeTools::compute_diagonal`: introduce template parameter `VectorType` (proposed by mschreter; merged) https://github.com/dealii/dealii/pull/13315 ## And this is a list of recently opened or closed discussions: #13348: Test fe_nedelec_sz_hessian_divergence_theorem.debug times out (opened) https://github.com/dealii/dealii/issues/13348 #13347: GMSH quad mesh with some cells with negative weight (opened) https://github.com/dealii/dealii/issues/13347 #13346: Negative det in MappingFE on some simplex mesh (opened) https://github.com/dealii/dealii/issues/13346 #13345: DataOut hdf5 does not support large files (opened) https://github.com/dealii/dealii/issues/13345 #13329: Link to wrong header file in Docu of MappingQ? (opened and closed) https://github.com/dealii/dealii/issues/13329 #13321: Replace std::pow with integer exponent (opened) https://github.com/dealii/dealii/issues/13321 #13295: Follow-ups to the introduction of `is_detected` (closed) https://github.com/dealii/dealii/issues/13295 #10561: Improve support of cell-data vectors in MatrixFree (closed) https://github.com/dealii/dealii/issues/10561 #8957: deal.II does not see the HDF5 package on Ubuntu 18.04 (closed) https://github.com/dealii/dealii/issues/8957 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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