Hello everyone! This is deal.II newsletter #271. 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: #16385: Test examples (proposed by tjhei) https://github.com/dealii/dealii/pull/16385 #16382: FEPointEvaluation::integrate(): Only zero out relevant DoFs (proposed by jh66637) https://github.com/dealii/dealii/pull/16382 #16381: Fix spelling in a CI step. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16381 #16380: Add reinit_faces() for Quadrature<dim> (proposed by jh66637) https://github.com/dealii/dealii/pull/16380 #16379: Use combined_orientation in two more FiniteElement functions. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/16379 #16378: Prohibit calling compress() on vectors with ghost elements. (proposed by bangerth) https://github.com/dealii/dealii/pull/16378 #16377: More small updates to tria_description.cc. (proposed by bangerth) https://github.com/dealii/dealii/pull/16377 #16375: Fix an unused variable warning. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/16375 #16374: Convert CreateDescriptionFromTriangulationHelper into a function. (proposed by bangerth) https://github.com/dealii/dealii/pull/16374 #16373: Use face_orientation to encode 2D orientation information. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/16373 #16371: Introduce a function Utilities::MPI::partial_and_total_sum(). (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16371 #16370: Improve documentation of TriangulationDescription and members. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16370 #16369: Some cleanups to create_description_from_triangulation(). (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16369 #16368: Better document create_description_from_triangulation(). (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16368 #16367: Choose a better name for a template argument. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16367 #16365: Fix the names of functions in the documentation of step-42. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16365 #16363: github-actions: simplify oneAPI setup with external action. (proposed by marcfehling) https://github.com/dealii/dealii/pull/16363 #16362: Bump actions/upload-artifact from 3 to 4 (proposed by dependabot[bot]; merged) https://github.com/dealii/dealii/pull/16362 #16361: Some more FEValuesBase cleanups (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16361 #16359: Introduce FEFacePointEvaluation with optimized FCL path (proposed by bergbauer) https://github.com/dealii/dealii/pull/16359 #16358: Minor update to the introduction of step-41. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16358 #16357: Choose a more efficient algorithm. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16357 #16355: Use std::variant instead of a hand-rolled version. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16355 #16354: Use a C++17 feature to make code more readable. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16354 #16352: Correct a condition. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16352 #16351: Do not create arrays we do not use. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16351 #16350: Use std::optional instead of a hand-rolled version of it. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16350 #16349: Disallow using direction flags for spacedim>dim+1. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16349 #16347: Add a test for a recent patch. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/16347 #16239: KINSOL: option to select QR orthogonalization strategy (proposed by sebproell; merged) https://github.com/dealii/dealii/pull/16239 #16237: Actually fix Triangulation copydocs (proposed by jpthiele; merged) https://github.com/dealii/dealii/pull/16237 ## And this is a list of recently opened or closed discussions: #16386: Regression tester regressed e7f6e8 (opened) https://github.com/dealii/dealii/issues/16386 #16384: step-14 segfaults in release mode (opened) https://github.com/dealii/dealii/issues/16384 #16383: step-9 crash in cycle 5 in release mode (opened) https://github.com/dealii/dealii/issues/16383 #16376: Communicator equality: same object vs. MPI_Comm_compare() (opened) https://github.com/dealii/dealii/issues/16376 #16372: Regression tester regressed 494449 (opened and closed) https://github.com/dealii/dealii/issues/16372 #16366: deal.ii vector and block_vector interaction (opened and closed) https://github.com/dealii/dealii/issues/16366 #16364: Difficulties with complex matrices (opened) https://github.com/dealii/dealii/issues/16364 #16360: Regression tester regressed 83805c (opened and closed) https://github.com/dealii/dealii/issues/16360 #16356: Merge triangulation duplicate_vertex_tolerance (opened and closed) https://github.com/dealii/dealii/issues/16356 #16353: Regression tester regressed a87a96 (opened and closed) https://github.com/dealii/dealii/issues/16353 #16346: Use std::optional in fe_values_base.h/cc. (closed) https://github.com/dealii/dealii/issues/16346 #16343: Disallow direction flags for lines in 3d. (closed) https://github.com/dealii/dealii/issues/16343 #16326: GridGenerator::merge_triangulation() and GridGenerator::replicate_triangulation() error (closed) https://github.com/dealii/dealii/issues/16326 #16144: Fix wrong comparison in compute_prefix_sum(). (closed) https://github.com/dealii/dealii/issues/16144 #16008: The step-42 documentation references functions no longer named that way. (closed) https://github.com/dealii/dealii/issues/16008 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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