Hello everyone! This is deal.II newsletter #151. 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: #11643: Cancelling workflow for github actions. (proposed by luca-heltai) https://github.com/dealii/dealii/pull/11643 #11642: Move make_triangulation into ReferenceCell::Type (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/11642 #11641: Shorten a test suite function. (proposed by drwells) https://github.com/dealii/dealii/pull/11641 #11640: Minor simplification in QProjector. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/11640 #11639: Fix FEPointEvaluation if only grad is requested (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/11639 #11638: simplex: step-6 (proposed by marcfehling) https://github.com/dealii/dealii/pull/11638 #11637: simplex: Adapt CellAccessor::neighbor_child_on_subface for triangles. (proposed by marcfehling) https://github.com/dealii/dealii/pull/11637 #11635: Add missing include file for SUNDIALS (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/11635 #11634: fix array bounds warning (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/11634 #11633: Added cxx17 flags to master build. (proposed by luca-heltai; merged) https://github.com/dealii/dealii/pull/11633 #11632: Removed wrapping for reference cell. (proposed by luca-heltai; merged) https://github.com/dealii/dealii/pull/11632 #11631: Fix typo (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/11631 #11630: Update interface of FEPointEvaluation (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/11630 #11629: Enable PYTHON_BINDINGS in linux-release-serial (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/11629 #11627: Bugfix: Clear DoFHandler in Triangulation create signal. (proposed by marcfehling) https://github.com/dealii/dealii/pull/11627 #11625: simplex: implement 'interface_constraints' for FE_Poly. (proposed by marcfehling) https://github.com/dealii/dealii/pull/11625 #11624: Nicely format exception texts. (proposed by bangerth) https://github.com/dealii/dealii/pull/11624 #11623: Work on FEPointEvaluation::integrate (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/11623 #11621: Fourth attempt. (proposed by luca-heltai; merged) https://github.com/dealii/dealii/pull/11621 #11620: Third attempt. (proposed by luca-heltai; merged) https://github.com/dealii/dealii/pull/11620 #11619: Second try. (proposed by luca-heltai; merged) https://github.com/dealii/dealii/pull/11619 #11618: Try to fix docker images. (proposed by luca-heltai; merged) https://github.com/dealii/dealii/pull/11618 #11617: Simplify some code. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/11617 #11616: CMake: increase minimum required version to 3.1.0 (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/11616 #11614: Permit conversion of triangulations with multiple levels to simplices. (proposed by drwells) https://github.com/dealii/dealii/pull/11614 #11613: Fix a variety of small simplex things. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/11613 #11611: Improve an error message. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/11611 #11610: Replace gsl_sf_legendre_Pl with std_cxx17::legendre in tests. (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/11610 #11609: muparser: install header files (proposed by tjhei) https://github.com/dealii/dealii/pull/11609 #11608: tests/fe_series: only run if we have gsl (proposed by tjhei) https://github.com/dealii/dealii/pull/11608 #11607: Move a function that is not performance-critical to the .cc file. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/11607 #11606: Introduce Mapping::is_compatible_with (proposed by tjhei) https://github.com/dealii/dealii/pull/11606 #11605: Fix comparisons in ReferenceCell (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/11605 #11604: Move the get_*mapping() functions into ReferenceCell::Type. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/11604 #11603: Hide the ability to create ReferenceCell objects from users. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/11603 #11602: Turn get_hypercube/simple() into templates. Move them into ReferenceCell::Type (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/11602 #11601: Let ReferenceCell::get_nodal_type_quadrature() return a 'const' reference (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/11601 #11600: Added test for FEQxFENothing and FENothingxFEQ constraints. (proposed by marcfehling) https://github.com/dealii/dealii/pull/11600 #11598: add ReferenceCell::Type::is_hyper_cube (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/11598 #11597: Remove now unnecessary things in ReferenceCell::Type. Make some things constexpr. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/11597 #11596: Fix ThreadLocalStorage assigment operators (proposed by nmuch; merged) https://github.com/dealii/dealii/pull/11596 #11582: Python wrappers for simplex and mixed meshes (proposed by agrayver; merged) https://github.com/dealii/dealii/pull/11582 #11505: Add FE_P_Bubbles (proposed by drwells; merged) https://github.com/dealii/dealii/pull/11505 #11395: Introduce SUNDIALS N_Vector module (proposed by sebproell; merged) https://github.com/dealii/dealii/pull/11395 ## And this is a list of recently opened or closed discussions: #11636: Implement Simplex::QGauss(4) without copying and pasting (opened) https://github.com/dealii/dealii/issues/11636 #11628: Robustness of ParameterHandler::parse_input() (opened) https://github.com/dealii/dealii/issues/11628 #11626: Broken python wrappers. (opened and closed) https://github.com/dealii/dealii/issues/11626 #11622: GridGenerator::merge_triangulations fails when input=output (opened) https://github.com/dealii/dealii/issues/11622 #11615: minimum cmake version? (opened and closed) https://github.com/dealii/dealii/issues/11615 #11612: Step-44: Use FE_DGP instead of FE_DGPMonomial? (opened) https://github.com/dealii/dealii/issues/11612 #11599: hp-adaptive refinement for simplices in 3D (opened) https://github.com/dealii/dealii/issues/11599 #11587: Potential bug in ThreadLocalStorage (closed) https://github.com/dealii/dealii/issues/11587 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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