Hello everyone! This is deal.II newsletter #332. 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: #18922: Add support for two level transfers using device vectors via MGTwoLevelTransferCopyToHost (proposed by RyanMoulday) https://github.com/dealii/dealii/pull/18922 #18921: Increase safety of Timer class (proposed by gassmoeller; merged) https://github.com/dealii/dealii/pull/18921 #18920: Simplify static assertions and condition checks (proposed by mwichro) https://github.com/dealii/dealii/pull/18920 #18919: Throw when running into errors reading gmsh files. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/18919 #18918: CMake: fix CMake error file location in error message (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/18918 #18917: Cleanup TensorProductMatrix with compile-time checks (proposed by mwichro; merged) https://github.com/dealii/dealii/pull/18917 #18916: step-95: require p4est (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/18916 #18915: doxygen: update mathjax URL (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/18915 #18913: Documentation improvements im Timer class (proposed by gassmoeller; merged) https://github.com/dealii/dealii/pull/18913 #18912: Do not return CPU time in Timer::stop() (proposed by gassmoeller; merged) https://github.com/dealii/dealii/pull/18912 #18911: MPI implementation of MatrixScaling class (proposed by PolvereUnipi) https://github.com/dealii/dealii/pull/18911 #18910: CellDataTransfer: clean up the calls to `compress()`. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/18910 #18909: Disallow TimerOutput output while running (proposed by gassmoeller; merged) https://github.com/dealii/dealii/pull/18909 #18908: Minor clean-up of the partitioned mesh reader. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/18908 #18907: Step-100: Solving the Time-Harmonic Helmholtz equation with the Discontinuous Petrov Galerkin (DPG) method (proposed by blaisb) https://github.com/dealii/dealii/pull/18907 #18906: Improve the formatting of an error message. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/18906 #18905: Add safety factor for eigenvalue estimation in preconditioners (proposed by mwichro; merged) https://github.com/dealii/dealii/pull/18905 #18902: MGTransferMatrixFree::initialize_dof_vector no longer checks for compatible partitioners (proposed by michelebucelli; merged) https://github.com/dealii/dealii/pull/18902 #18901: pre-commit autoupdate (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/18901 #18898: Add a ugrid mesh reader to GridIn. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/18898 #18897: Add a necessary include file. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/18897 #18896: Move documentation within the GridIn class. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/18896 #18895: Add assembly of MGTwoLevelTransfer operations as sparse matrices (proposed by marksidoro) https://github.com/dealii/dealii/pull/18895 #18894: DataOut: remove captured `this` to avoid dangle after copy/move (proposed by dabele; merged) https://github.com/dealii/dealii/pull/18894 #18893: Remove unnecessary include (proposed by gassmoeller; merged) https://github.com/dealii/dealii/pull/18893 #18890: Minor doc updates in GridIn. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/18890 #18888: Step-80 (proposed by luca-heltai) https://github.com/dealii/dealii/pull/18888 #18884: LowStorageRungeKutta: fix size of a (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/18884 #18883: Move logic from setup() into initialize in all petsc preconditioners. (proposed by RyanMoulday; merged) https://github.com/dealii/dealii/pull/18883 #18882: Fix a missing check in step-7. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/18882 #18879: Simplify handling of timer overhead in TimerOutput (proposed by gassmoeller; merged) https://github.com/dealii/dealii/pull/18879 #18874: Read partitioned msh with ids (proposed by luca-heltai; merged) https://github.com/dealii/dealii/pull/18874 #18866: Simplify TimerOutput storage and fix documentation (proposed by gassmoeller; merged) https://github.com/dealii/dealii/pull/18866 ## And this is a list of recently opened or closed discussions: #18914: GridIn throws runtime error when reading high-order (quadratic) Gmsh mesh (opened and closed) https://github.com/dealii/dealii/issues/18914 #18904: Regression tester regressed b21f38 (opened and closed) https://github.com/dealii/dealii/issues/18904 #18903: Netcdf/CF/Ugrid output (opened) https://github.com/dealii/dealii/issues/18903 #18900: Internal error in MGTwoLevelTransferBase::restrict_and_add for p-multigrid (opened) https://github.com/dealii/dealii/issues/18900 #18899: step-95: The object pointed to is not valid anymore. (opened) https://github.com/dealii/dealii/issues/18899 #18892: DataOut cannot be copied/moved/returned from a function (opened and closed) https://github.com/dealii/dealii/issues/18892 #18891: Regression tester regressed a89304 (opened) https://github.com/dealii/dealii/issues/18891 #18889: step-93 make_hanging_node_constraints with adaptive mesh refinement (opened) https://github.com/dealii/dealii/issues/18889 #11352: Simplex/mixed mesh-support follow up tasks (closed) https://github.com/dealii/dealii/issues/11352 #7005: add GridGenerator for matrix-inclusion (closed) https://github.com/dealii/dealii/issues/7005 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 [email protected], or by opening issues or pull requests at https://www.github.com/dealii/dealii. 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