Hello everyone! This is deal.II newsletter #299. 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: #17714: Make sure the SmartPointer template remains accessible. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/17714 #17711: Also rename the Subscriptor base class. (proposed by bangerth) https://github.com/dealii/dealii/pull/17711 #17710: Add changelog for normal hessian functions (proposed by bergbauer; merged) https://github.com/dealii/dealii/pull/17710 #17709: Fix normal_hessian functions for arbitrary number of components (proposed by koch-andreas; merged) https://github.com/dealii/dealii/pull/17709 #17708: Add a forgotten closing parenthesis. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/17708 #17707: Make improvements to the WorkStream colored implementation (proposed by RyanMoulday; merged) https://github.com/dealii/dealii/pull/17707 #17705: AffineConstraints::compute_locally_relevant_constraints() skip step (proposed by peterrum) https://github.com/dealii/dealii/pull/17705 #17704: Use Utilties::MPI::compute_index_owner() instead of lower-level facilities. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/17704 #17702: Better document an algorithm. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/17702 #17701: Clarify documentation. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/17701 #17700: Make clear what a boolean argument corresponds to. (proposed by bangerth) https://github.com/dealii/dealii/pull/17700 #17699: `AffineConstraints`: Improve loop (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/17699 #17698: Remove a section about ways to use doxygen that we don't use. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/17698 #17697: Remove references to BlockMatrixArray from the documentation. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/17697 #17695: Minor cleanups to AffineConstraints to make code easier to read. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/17695 #17693: Make the semantics of a lambda capture clear. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/17693 #17690: More tests for ParsedFunction. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/17690 #17689: Rename SmartPointer -> ObserverPointer. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/17689 #17688: add Scott-Vogelius test (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/17688 #17687: TriaAccessor::face(): consolidate implementations via `if constexpr`. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/17687 #17686: Fix a changelog date. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/17686 #17685: Bump crate-ci/typos from 1.24.3 to 1.24.5 (proposed by dependabot[bot]; merged) https://github.com/dealii/dealii/pull/17685 #17684: WorkStream support for particle sorting (proposed by RyanMoulday) https://github.com/dealii/dealii/pull/17684 #17683: Use TaskResult::emplace_object() in class Lazy. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/17683 #17681: GridGenerator::convert_hypercube_to_simplex_mesh: code cleanup (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/17681 #17679: Ensure SmartPointer gives useful compiler errors for types not derived from Subscriptor. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/17679 #17678: Triangulation::get_boundary_ids(): don't return duplicates. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/17678 #17677: Update documentation of class SmartPointer. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/17677 #17676: Test that one can put a SmartPointer into a std::any object. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/17676 #17675: Rename a member of class SmartPointer. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/17675 #17671: Update tidy tester to ubuntu 24.04. (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/17671 #17662: Patched GridTools::transform() to work on anisotropically refined meshes in 3D as well (proposed by rgoermer; merged) https://github.com/dealii/dealii/pull/17662 #17639: add GridGenerator::alfeld_split_of_simplex_mesh (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/17639 #17408: Symmetrize fourth order tensor (proposed by vinayakvijay; merged) https://github.com/dealii/dealii/pull/17408 ## And this is a list of recently opened or closed discussions: #17716: computing 3D rotation matrix for small angles (opened) https://github.com/dealii/dealii/issues/17716 #17715: failed to build dealii v9.5.2 on linux, target object_numerics_inst, expected type-specifier before << split >> (opened) https://github.com/dealii/dealii/issues/17715 #17713: `SmartPointer` compatibility (opened and closed) https://github.com/dealii/dealii/issues/17713 #17712: Missing instantiations for `TrilinosWrappers::SparseMatrix::vmult` when compiling a user project linked against deal.II compiled with clang (opened) https://github.com/dealii/dealii/issues/17712 #17706: failed to build deal.II-9.5.1 with LAPACK provided by MKL. (opened) https://github.com/dealii/dealii/issues/17706 #17703: Break out a part of the ComputeIndexOwner::ConsensusAlgorithmsPayload functionality. (opened) https://github.com/dealii/dealii/issues/17703 #17696: Deprecate IntegrationInfo and IntegrationInfoBox. (opened) https://github.com/dealii/dealii/issues/17696 #17694: Improve implementation of TaskFlow-based implementation of WorkStream. (opened and closed) https://github.com/dealii/dealii/issues/17694 #17692: Make AffineConstraints::make_consistent_in_parallel() more efficient, part 2. (opened and closed) https://github.com/dealii/dealii/issues/17692 #17691: Make AffineConstraints::make_consistent_in_parallel() more efficient, part 1. (opened) https://github.com/dealii/dealii/issues/17691 #17665: Regression tester regressed 270aba (closed) https://github.com/dealii/dealii/issues/17665 #17653: Regression tester regressed 64e9c0 (closed) https://github.com/dealii/dealii/issues/17653 #17646: Regression tester regressed 2285fb (closed) https://github.com/dealii/dealii/issues/17646 #17643: Regression tester regressed [baseline] (closed) https://github.com/dealii/dealii/issues/17643 #17535: Ensure 'Function constant' in ParsedFunction is a constant, not an expression. (closed) https://github.com/dealii/dealii/issues/17535 #17403: Symmetrize tensors of type Tensor<4,3> (closed) https://github.com/dealii/dealii/issues/17403 #17318: Fix Lazy's approach to tasking. (closed) https://github.com/dealii/dealii/issues/17318 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! 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