Hello everyone! This is deal.II newsletter #340. 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: #19103: Refactor parts of tria.cc and add additional comments (proposed by AndSte01; merged) https://github.com/dealii/dealii/pull/19103 #19102: Avoid invalid operations in step-42 -- and do it better anyway! (proposed by bangerth) https://github.com/dealii/dealii/pull/19102 #19100: Fix the target of a compress operation in step-42. (proposed by bangerth) https://github.com/dealii/dealii/pull/19100 #19099: Fix a comment in step-42. (proposed by bangerth) https://github.com/dealii/dealii/pull/19099 #19098: Also output the output file directory in step-42. (proposed by bangerth) https://github.com/dealii/dealii/pull/19098 #19097: Introduce function that returns an iterator over the face indices of a certain type of a reference cell. (proposed by AndSte01) https://github.com/dealii/dealii/pull/19097 #19096: Run pre-commit autoupdate. (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/19096 #19095: ParticleHandler: Add methods to collect particles from active descendant cells (proposed by j-brotz) https://github.com/dealii/dealii/pull/19095 #19093: Implement isotropic refinement of Wedges (proposed by AndSte01) https://github.com/dealii/dealii/pull/19093 #19092: Implement a better scheme for CellType* vs ReferenceCell. (proposed by bangerth) https://github.com/dealii/dealii/pull/19092 #19090: Make a variable 'const'. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19090 #19089: Do not allow modification of vectors with ghosts. (proposed by bangerth) https://github.com/dealii/dealii/pull/19089 #19088: Add assertions to a lambda function. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19088 #19087: Add a comment on task creation with Taskflow. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19087 #19086: Fix neighbor child on subface (proposed by dominiktassilostill) https://github.com/dealii/dealii/pull/19086 #19085: Add face guess to reference cell (proposed by dominiktassilostill; merged) https://github.com/dealii/dealii/pull/19085 #19084: Bump actions/upload-artifact from 5 to 6 (proposed by dependabot[bot]; merged) https://github.com/dealii/dealii/pull/19084 #19083: Query number of vertices from ReferenceCell. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19083 #19082: Rely on ReferenceCell facilities in one more place. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19082 #19081: Do not use memset(..., 0) for complex data types. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19081 #19080: SparseDirectMUMPS and LA::distributed::Vector (proposed by fdrmrc) https://github.com/dealii/dealii/pull/19080 #19078: Remove some more duplicated code from connectivity.h (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19078 #19077: taskflow: allow nested scheduling with corun() (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/19077 #19076: followup to taskflow apply_to_subranges() (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/19076 #19075: Rename argument, fix grammar. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19075 #19074: Remove some code duplication between connectivity.h and ReferenceCell. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/19074 #19071: Fix for wrong orientation correction during extraction of new lines created while refining triangular faces as a step to isotopically refine 3d cells. (proposed by AndSte01; merged) https://github.com/dealii/dealii/pull/19071 #19070: VectorizedArray<float, 16>: Avoid workaround to fix warnings (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/19070 #19069: Geometric multigrid transfer: Fix bug of 64 -> 32 bit narrowing (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/19069 #19068: Portable::MatrixFree::get_data() swap arguments (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/19068 #19065: Fix swapped lines in wedges (proposed by AndSte01; merged) https://github.com/dealii/dealii/pull/19065 #19064: Enable `Taskflow` based parallelization of `apply_to_subranges()` (proposed by QY-Shi; merged) https://github.com/dealii/dealii/pull/19064 #19060: Add improvements to the WorkStream color implementation using Taskflow. (proposed by RyanMoulday; merged) https://github.com/dealii/dealii/pull/19060 #19055: Add time information to pvtu output (proposed by floschulze; merged) https://github.com/dealii/dealii/pull/19055 #19048: Simplify FE_Hermite::Rescaler. Add extraction function for b.c. (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/19048 #19012: Add parallel reduction to ROL Wrapper. (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/19012 #19002: Rename the ROL interface class. (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/19002 #18974: Nodal variant of Nedelec element (proposed by nataneb; merged) https://github.com/dealii/dealii/pull/18974 ## And this is a list of recently opened or closed discussions: #19104: Use std::filesystem in step-42 to create a directory. (opened) https://github.com/dealii/dealii/issues/19104 #19101: `colorize` flag misleading for `subdivided_hyper_cube` (opened) https://github.com/dealii/dealii/issues/19101 #19094: Places where we use modifying operations on ghosted vectors. (opened) https://github.com/dealii/dealii/issues/19094 #19091: TrilinosWrappers::MPI::Vector::operator=(const TrilinosScalar s) should check that s==0. (opened) https://github.com/dealii/dealii/issues/19091 #19079: Improve asynchronous tasks with Taskflow (opened) https://github.com/dealii/dealii/issues/19079 #19073: Problem with postprocessor get_cell() documentation (opened) https://github.com/dealii/dealii/issues/19073 #19072: Remove CellType* class hierarchy in connectivity.h in favor of ReferenceCell. (opened) https://github.com/dealii/dealii/issues/19072 #19067: `FE::has_support_on_face` not working for `FE_SimplexP` (always returns `true`) (opened) https://github.com/dealii/dealii/issues/19067 #19053: pvtu files do not contain time variable (closed) https://github.com/dealii/dealii/issues/19053 #13670: Rol::VectorAdaptor::reduce() does not perform parallel reduction (closed) https://github.com/dealii/dealii/issues/13670 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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