Hello everyone! This is deal.II newsletter #128. 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: #10792: fix tests/simplex/data_out_write_vtk_01 (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/10792 #10791: Update an outdated code comment (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/10791 #10790: Debug (proposed by peterrum) https://github.com/dealii/dealii/pull/10790 #10789: Simplex action: load metis and be verbose on failure (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/10789 #10788: fix dof_accessor warning (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/10788 #10787: Jenkinsfile: convert tabs to spaces (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/10787 #10786: jenkins: use Og on tester (proposed by tjhei) https://github.com/dealii/dealii/pull/10786 #10785: Fix MPIEXEC detection again. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/10785 #10784: Use face_no in FE (proposed by peterrum) https://github.com/dealii/dealii/pull/10784 #10783: Pass face_no to FE functions (proposed by peterrum) https://github.com/dealii/dealii/pull/10783 #10782: Fix step-18. (proposed by adamqc; merged) https://github.com/dealii/dealii/pull/10782 #10781: Simplify some code. (proposed by bangerth) https://github.com/dealii/dealii/pull/10781 #10780: Convert all face-related data structures of FiniteElement to vectors (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/10780 #10779: Add face_no to methods of FiniteElements (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/10779 #10778: Generalize FiniteElementData s.t. faces can different nr. of dofs (proposed by peterrum) https://github.com/dealii/dealii/pull/10778 #10777: Introduce FiniteElementData::max_dofs_per_quad() (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/10777 #10776: Refactor DoFHandlerImplementation::reserve_space for 3D (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/10776 #10775: Simplify the usage of ensure_existence_of_dof_identities (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/10775 #10774: suppress boost warnings (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/10774 #10773: CI: change git depth for indent worker (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/10773 #10772: Update an error text. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/10772 #10771: fix typos in step 47 (proposed by zjiaqi2018; merged) https://github.com/dealii/dealii/pull/10771 #10770: Enable VectorTools::interpolate for hp::MappingCollection (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/10770 #10769: Fix conflict with Simplex::GridGenerator (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/10769 #10768: Improve DataOutDoFData error message ExcInvalidVectorSize (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/10768 #10766: Non local dofs (inside FE) (proposed by luca-heltai) https://github.com/dealii/dealii/pull/10766 #10764: Assign faces different quadrature rules (proposed by peterrum) https://github.com/dealii/dealii/pull/10764 #10762: MF mapping info: Avoid invalid access of some face-data-by-cells (proposed by kronbichler) https://github.com/dealii/dealii/pull/10762 #10761: [step-67] Close a brace in introduction (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/10761 #10760: Do not update ghost values in MGTransferMatrixFree::prolongate (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/10760 #10759: delete a word in step-47 (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/10759 #10758: Add mini simplex application tests (proposed by peterrum) https://github.com/dealii/dealii/pull/10758 #10757: CI: add tester for simplex tests (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/10757 #10752: Improve memory behavior of the BiCGStab solver. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/10752 #10748: GridIn::read_vtk() for simplex meshes (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/10748 #10734: Check that MPIEXEC_EXECUTABLE is available in the test suite. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/10734 #10727: GridIn::read_msh() now supports triangular and tetrahedral elements (proposed by DanielPaukner; merged) https://github.com/dealii/dealii/pull/10727 #10701: Generalize DataOut::write_vtk for simplex mesh (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/10701 #10659: Introduce MappingFE (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/10659 #10653: Remove unused tests (proposed by dangars; merged) https://github.com/dealii/dealii/pull/10653 #9973: make ARKode ODE solver use DiscreteTime internally (proposed by rezarastak; merged) https://github.com/dealii/dealii/pull/9973 ## And this is a list of recently opened or closed discussions: #10767: Misleading error message in add_data_vector() function. (opened and closed) https://github.com/dealii/dealii/issues/10767 #10765: doxygen is confused by simplex namespace (opened and closed) https://github.com/dealii/dealii/issues/10765 #10763: Geometry compression for face data by cells in MappingInfo (opened) https://github.com/dealii/dealii/issues/10763 #10331: Configuration, make setup_tests etc. succeed even if MPIEXEC_EXECUTABLE is not found (closed) https://github.com/dealii/dealii/issues/10331 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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