Hello everyone! This is deal.II newsletter #250. 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: #15118: PETScWrappers: update KSP support (proposed by stefanozampini) https://github.com/dealii/dealii/pull/15118 #15117: PETScWrappers Fix docs for SF classes (proposed by stefanozampini) https://github.com/dealii/dealii/pull/15117 #15116: block fixes (proposed by stefanozampini) https://github.com/dealii/dealii/pull/15116 #15115: Fix a class name in step-69 commentary. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/15115 #15113: Address the pesky 'MPI_Comm as void*' problem with the SUNDIALS interfaces (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/15113 #15109: Remove PETSc compatibility things. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/15109 #15108: Fix heading level in step-7 results.dox. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/15108 #15107: Fix a funny comment. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/15107 #15106: Add 'requires' clauses to the rest of the triangulation classes. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/15106 #15105: Fix interface mismatch in ScratchData in hp mode. (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/15105 #15104: Improve error message. (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/15104 #15103: Add a test for FEInterfaceValues::reinit with no dominating FE. (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/15103 #15102: Add tolerance to box in compute_point_locations_try_all (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/15102 #15101: extend distributed_compute_point_locations (proposed by jh66637; merged) https://github.com/dealii/dealii/pull/15101 #15100: Better document an argument to hp::FEFaceValues. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/15100 #15099: Add a check and produce better errors in FEInterfaceValues::reinit(). (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/15099 #15098: Better document ExcFunctionNonzeroReturn exception. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/15098 #15097: Better document FEInterfaceValues::reinit(). (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/15097 #15093: examples/step-1: undo accidental changes to CMakeLists.txt (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/15093 #15092: Use latest ubuntu image in docker.yml. (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/15092 #15091: Convert PreconditionChebyshev::set_initial_guess_kernel to Kokkos (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/15091 #15088: Don't mention wrong defaults in CompressionFlags (proposed by sebproell; merged) https://github.com/dealii/dealii/pull/15088 #15083: Fix some minor typos (proposed by olegrog; merged) https://github.com/dealii/dealii/pull/15083 #15074: Build both focal and jammy images. (proposed by luca-heltai; merged) https://github.com/dealii/dealii/pull/15074 #15066: PETScWrappers: Add support for ODE solver (proposed by stefanozampini; merged) https://github.com/dealii/dealii/pull/15066 #15035: Optimize mapping computation in MappingQ (proposed by bergbauer; merged) https://github.com/dealii/dealii/pull/15035 #15033: Add signed distance function for Zalesak's disk (proposed by mschreter; merged) https://github.com/dealii/dealii/pull/15033 #15013: Enable vectorization over quadrature points in whole FEPointEvaluation (proposed by bergbauer; merged) https://github.com/dealii/dealii/pull/15013 #14988: Rework the introduction to step-7. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/14988 #14987: Leave a hint in step-7. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/14987 ## And this is a list of recently opened or closed discussions: #15114: step-69 does not mark momentum as a vector for DataOut (opened) https://github.com/dealii/dealii/issues/15114 #15112: Do not return error codes via int return values in external interfaces (opened) https://github.com/dealii/dealii/issues/15112 #15111: ParameterAcceptor::clear() leads to use after free (opened) https://github.com/dealii/dealii/issues/15111 #15110: ParameterHandler::add_parameter() doesn't work with unsigned int variable defaulted to invalid_unsigned_int (opened) https://github.com/dealii/dealii/issues/15110 #15096: Develop more tiebreakers for FEInterfaceValues::reinit() for different kinds of elements. (opened) https://github.com/dealii/dealii/issues/15096 #15095: Force user to provide q_index in FEInterfaceValues::reinit() if the two elements on both sides don't dominate each other. (opened and closed) https://github.com/dealii/dealii/issues/15095 #15094: Document the logic in FEInterfaceValues::reinit() (opened and closed) https://github.com/dealii/dealii/issues/15094 #15090: Can't compile current master with PETSc 3.7.4 (opened) https://github.com/dealii/dealii/issues/15090 #15089: Should we have a 'timestepping' folder? (opened) https://github.com/dealii/dealii/issues/15089 #15021: FEInterfaceValues::reinit fails when neither element dominates (closed) https://github.com/dealii/dealii/issues/15021 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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