deal.II Newsletter #361

[Rene Gassmoeller]

Hello everyone!

This is deal.II newsletter #361.
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:

#20049: Fix potential out of bounds array access inside grid_in relating to dimEntity reads (proposed by RyanMoulday)
#20048: Revert "Move logic from setup() into initialize in all petsc preconditioners." (proposed by RyanMoulday)
#20047: Require Epetra for step-33 (proposed by masterleinad)
#20046: Fix step-trilinos for Tpetra (proposed by masterleinad; merged)
#20045: TriangulationDescription: store material ids of cells. (proposed by drwells)
#20041: Change sign for pressure term in step 104 (proposed by quangx; merged)
#20040: Make cell_index global inside Portable::MatrixFree (proposed by RyanMoulday)
#20038: Fix out of bounds writes for gmsh files with misleading vertex counts (proposed by RyanMoulday; merged)
#20037: [9.9] Make sure we actually call the function we always intended to call. (proposed by bangerth)
#20036: [9.9] Do not declare a function not needed. (proposed by bangerth)
#20035: [9.9] Remove unused functions declared in .cc files as TU-local. (proposed by bangerth)
#20034: doxygen: change latex quotes and code formulas (proposed by tjhei; merged)
#20032: gh-actions: Update indent checks to ubuntu-26.04. (proposed by marcfehling; merged)
#20031: Try something else for the module builds. (proposed by bangerth; merged)
#20029: Update step-37 diff file (proposed by kronbichler; merged)
#20028: Fix tests/examples/step-104 in release mode (proposed by kronbichler; merged)
#20027: step-104: update acknowledgements (proposed by tjhei; merged)
#20026: step-104: use the new MGTwoLevelTransfer (proposed by tjhei; merged)
#20025: step-104: fix list formatting (proposed by tjhei; merged)
#20024: Try using g++ 16 as the base library for modules. (proposed by bangerth)
#20023: Make Portable::MGTwoLevelTransfer support FESystem (proposed by iprusak; merged)
#20022: doxygen: change code back to quotes (proposed by tjhei; merged)
#20021: Fix some doxygen warnings. (proposed by marcfehling; merged)
#20020: Export more operators. (proposed by bangerth)
#20019: Revert "Do not export some symbols from GCC's libstdc++ if using GCC." (proposed by bangerth)
#20018: Fix a bunch of doxygen issues. (proposed by bangerth; merged)
#20017: step-104: add high order throughput (proposed by tjhei; merged)
#20016: fix a few doxygen problems (proposed by tjhei; merged)
#20015: gh-actions: Update tidy checks to ubuntu-26.04. (proposed by marcfehling; merged)
#20012: Disabled inplace optimizations for device vectors inside MGTwoLevelTranferCore (proposed by RyanMoulday; merged)
#20010: Portable::MatrixFree::get_cell_iterator() add some Asserts (proposed by tjhei; merged)
#20009: [WIP] Add ITK for generating level sets from images (proposed by SanojKnalp)
#20006: LA::BlockVector: support update_ghost_values_start/finish (proposed by tjhei; merged)
#20005: Portable::MatrixFree: support overlapping BlockVector loop (proposed by tjhei; merged)
#20004: Portable::MatrixFree BlockVector loop: honor team size setting (proposed by tjhei; merged)
#20003: Do not export GCC internal symbols from modules. (proposed by bangerth; merged)
#20002: Allow reading mesh files with DOS line endings. (proposed by bangerth)
#20001: Wedge support points for arbitrary orders (proposed by dominiktassilostill)
#20000: Fix an error message string. (proposed by bangerth; merged)
#19999: Add an assertion. (proposed by bangerth; merged)
#19998: Fix some issues with the Abaqus-to-UCD conversion, part 1. (proposed by bangerth)
#19997: Add tests/matrix_free_kokkos/evaluate_3d_shape.cc (proposed by tjhei; merged)
#19996: Add higher order derivatives for simplex shape functions (proposed by dominiktassilostill)
#19995: Adjust tolerance for testing accuracy of floating point numbers (proposed by kronbichler; merged)
#19994: dof_renumbering_05: add alternative output files. (proposed by drwells; merged)
#19993: Add an alternate output for pattern_tools_06. (proposed by drwells; merged)
#19992: Adjust length h for difference approximation in a test (proposed by kronbichler; merged)
#19991: changelog for Portable::MatrixFree systems (proposed by tjhei; merged)
#19990: Fix two minor issues with our new Frosch wrappers. (proposed by drwells; merged)
#19989: Only module-export PETSC_TRUE/FALSE if they are not macros. (proposed by bangerth; merged)
#19988: Add necessary header include to SUNDIALS module. (proposed by bangerth; merged)
#19987: Fix an out-of-bounds access in MatrixFree face mapping initialization (proposed by mschreter; merged)
#19986: Avoid a compiler warning about a trailing backslash in comments. (proposed by bangerth; merged)
#19985: Wedge dpo vector for arbitrary orders (proposed by dominiktassilostill)
#19984: [BOUNTY] Add docs/CHANGELOG_TYPO_FIX_v2.md - CVG Hive (proposed by cleargeo)
#19983: Use the same solver range for all bicgstab tests. (proposed by drwells; merged)
#19982: Introduce second face number in `hp_quad_dof_identities` (proposed by dominiktassilostill)
#19981: Clean up a test with 2d curl type (proposed by kronbichler; merged)
#19980: Bump https://github.com/crate-ci/typos from v1.47.2 to 1.48.0 (proposed by dependabot[bot]; merged)
#19979: Add a script that creates a graph with the number of authors per year. (proposed by bangerth; merged)
#19978: Avoid reallocating values_host_buffer repeatedly (proposed by masterleinad; merged)
#19977: nvcc: ignore #3189-D warning (proposed by tjhei; merged)
#19975: parallel::distributed::Vector::compress() is a noop with one MPI rank (proposed by tjhei; merged)
#19974: Add a note to step-58. (proposed by bangerth; merged)
#19973: Fix typo in changelog (proposed by kronbichler; merged)
#19972: PETSc test: Fix output (proposed by kronbichler; merged)
#19971: Deprecate a function introduced in #16644. (proposed by bangerth; merged)
#19970: Linear operator test: Actually test what we're supposed to check (proposed by kronbichler; merged)
#19969: SolverGMRES with delayed re-orthogonalization: Fix lucky breakdown (proposed by kronbichler; merged)
#19968: do not use deprecated dof_info.templates.h header (proposed by tjhei; merged)
#19967: Stop printing preconditioner names earlieer in a SolverMPGMRES test (proposed by kronbichler; merged)
#19966: Make a test more robust by printing more digits (proposed by kronbichler; merged)
#19965: Add an output variant for a PETSc preconditioner test (proposed by kronbichler; merged)
#19964: Make a PETSc iterative solver test more robust (proposed by kronbichler; merged)
#19963: Make a test more robust (proposed by kronbichler; merged)
#19962: Adds get and submit divergence functions to Portable::FEEvaluation (proposed by RyanMoulday; merged)
#19961: FullMatrix: use a different matrix for the bigger determinant. (proposed by drwells; merged)
#19960: Second order derivatives for simplex shape functions (proposed by dominiktassilostill; merged)
#19959: Robust implementation of simplex polynomials (proposed by dominiktassilostill; merged)
#19958: Higher order derivatives for Jacobi polynomials (proposed by dominiktassilostill; merged)
#19957: Fix Gmsh temporary file handling (proposed by masaqif)
#19956: SparseDirectMUMPS: fix 64-bit indices and Epetra. (proposed by drwells; merged)
#19955: Portable::MatrixFree: do not use TeamThreadMDRange algorithm for now (proposed by tjhei; merged)
#19954: PreconditionChebychev: assert valid smoothing_range (proposed by tjhei; merged)
#19952: Refactor CellTransferFactory::run to avoid recursion (proposed by masterleinad; merged)
#19951: Fix copy assignment (PSBLAS interface) (proposed by fdrmrc; merged)
#19949: add to .gitignore (proposed by tjhei; merged)
#19948: Housekeeping of #cmakedefine for bundled packages. (proposed by marcfehling; merged)
#19947: CMake: Added t8code as feature. (proposed by marcfehling)
#19946: split instantiations of mg_tranfer_matrix_free (proposed by tjhei; merged)
#19945: MSVC: turn /Zc:inline on by default. (proposed by drwells)
#19944: Optimize CellIDTransfer a bit. (proposed by drwells; merged)
#19943: Better document the mesh loop functions in step-39. (proposed by bangerth; merged)
#19942: Better document the new parts of step-39. (proposed by bangerth; merged)
#19941: Remove an unnecessary #include from step-39. (proposed by bangerth; merged)
#19940: Preprocessor macros for Tpetra vector element access (proposed by gassmoeller; merged)
#19939: Make step-45 compatible with Trilinos 17 (proposed by gassmoeller; merged)
#19938: Remove the rest of the `inline`s from the source directory. (proposed by drwells; merged)
#19937: Implement a partition method that takes a zoltan object as argument. (proposed by kinnewig)
#19933: Simplify interface to vector access with hanging node constraints (proposed by kronbichler; merged)
#19928: Space two pictures in the documentation of DataPostprocessorTensor. (proposed by bangerth; merged)
#19924: Clarify some code comments. (proposed by bangerth; merged)
#19916: Add a pull request template with an AI disclosure statement (proposed by blaisb; merged)
#19881: Add `adjust_quad_dof_index_for_face_orientation_table` for `FE_SimplexP` (proposed by dominiktassilostill; merged)
#19828: Add step-104 example: Stokes on GPUs (proposed by quangx; merged)
#19394: CMake: Fix detected PSBLAS library list (proposed by fdrmrc; merged)
#18946: MatrixFree: extend hp adaptivity features for DG (proposed by peterrum; merged)
#17684: WorkStream support for particle sorting (proposed by RyanMoulday; merged)
#16644: FE_NedelecSZ: Find hanging edges rework (proposed by kinnewig; merged)
#14324: MatrixFree: Store indices of Dirichlet constrained DoFs as `-1` (proposed by kronbichler; merged)

And this is a list of recently opened or closed discussions:

#20050 step-31/step-104: Check sign for B matrix in block matrix (opened)
#20044 Missing vmult() in Tpetra preconditioners. (opened)
#20043 Missing lp_norm in dealii::LinearAlgebra::TpetraWrappers::Vector<double, dealii::MemorySpace::Host> (opened)
#20042 Missing conversion from BlockVector to TrilinosWrappers::MPI::BlockVector when using Tpetra (opened)
#20039 Trilinos quicktest fail when compiled against Trilinos 17.* (opened and closed)
#20033 Set MARKDOWN_STRICT=YES for doxygen. (opened)
#20030 Portable::MatrixFree get_current_cell_index() for colored user cell data (opened)
#20014 Modern doxygen creates overwhelming amount of warnings (opened)
#20013 CI linux / noble clang-23 modules currently failing (opened)
#20011 Fix inplace_operations for device vectors inside MGTwoLevelTransferCore (opened and closed)
#20008 Fix preconditioner setup in code-gallery/two_phase_flow/MultiPhase. (opened)
#20007 Security issue: don't just decompress unknown data. (opened)
#19976 device parallel::distributed:vector compress/ghost update performance (opened)
#19953 Manifold assignment in 2D uniform_channel_with_cylinder (opened)
#19950 missing Portable::FEEvaluation submit_divergence() (opened and closed)
#19918 Improve setup costs of TwoLevelTransfer::reinit_geometric_transfer (closed)
#19188 FPE exception (closed)
#14098 Performance of FEEvaluation::read_dof_values with masks (closed)

A list of all major changes since the last release can be found at this website.

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