Hello everyone! This is deal.II newsletter #254. 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: #15239: Fix the number of pyramid lines and one pyramid table. (proposed by drwells) https://github.com/dealii/dealii/pull/15239 #15238: Initialize and check an assertion in the NOX solver. (proposed by bangerth) https://github.com/dealii/dealii/pull/15238 #15237: Properly treat exceptions in a user callback in NOX. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/15237 #15236: Minor updates to the NOX solver documentation. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/15236 #15235: Fix Tpetra for newer Trilinos (proposed by masterleinad) https://github.com/dealii/dealii/pull/15235 #15233: fix bug in find_active_cell_around_point (proposed by richardschu) https://github.com/dealii/dealii/pull/15233 #15231: improve documentation for PETSc SNES (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/15231 #15230: Patterns: Fix parsing lists of lists (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/15230 #15229: MatrixFree: Avoid setting face vectorization group boundary in serial (proposed by kronbichler) https://github.com/dealii/dealii/pull/15229 #15228: Avoid compiler warning (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/15228 #15226: Tpetra is not functional without sync() function (proposed by sebproell) https://github.com/dealii/dealii/pull/15226 #15223: Convert ARKode interfaces to conform to our callback policy. (proposed by bangerth) https://github.com/dealii/dealii/pull/15223 #15222: Minor doc improvement in step-6. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/15222 #15221: Update output of step-77. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/15221 #15220: fix some compiler warnings (proposed by richardschu; merged) https://github.com/dealii/dealii/pull/15220 #15219: fixed some compiler warnings in tria.cc (proposed by richardschu) https://github.com/dealii/dealii/pull/15219 #15218: Add a function for computing distances to unit cells. (proposed by drwells) https://github.com/dealii/dealii/pull/15218 #15217: Make MatrixFree evaluation kernels more flexible w.r.t. number type (proposed by kronbichler) https://github.com/dealii/dealii/pull/15217 #15216: SUNDIALS: remove outdated copy functionality (proposed by sebproell; merged) https://github.com/dealii/dealii/pull/15216 #15215: Face path for FEPointEvaluation (proposed by bergbauer; merged) https://github.com/dealii/dealii/pull/15215 #15214: Fix step-77 NOX test (proposed by sebproell; merged) https://github.com/dealii/dealii/pull/15214 #15212: Fix Kokkos compilation with GCC 13. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/15212 #15211: FEPointEvaluation: Use template argument consistently (proposed by bergbauer; merged) https://github.com/dealii/dealii/pull/15211 #15210: Fix step-77: zero out residual before assembly (proposed by sebproell; merged) https://github.com/dealii/dealii/pull/15210 #15209: Integrate DG into non-nested MG (proposed by jh66637) https://github.com/dealii/dealii/pull/15209 #15208: Fix typo in documentation (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/15208 #15207: Tensor product kernels: Use the right type in some templated functions (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/15207 #15206: Fix warnings with gcc-13.1 (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/15206 #15205: CMake: create a compile_commands.json symlink (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/15205 #15204: Adds create_with_same_size function (proposed by MarcelKoch) https://github.com/dealii/dealii/pull/15204 #15203: Updates Ginkgo solver wrappers (proposed by MarcelKoch) https://github.com/dealii/dealii/pull/15203 #15202: Adds wrappers for Ginkgo matrices (proposed by MarcelKoch) https://github.com/dealii/dealii/pull/15202 #15200: Use Kokkos to launch kernels in CUDAWrappers::MatrixFree (proposed by Rombur) https://github.com/dealii/dealii/pull/15200 #15199: Allow finding user-installed HDF5 (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/15199 #15197: Add an abstract base class ReadVector purely for vector access. (proposed by drwells) https://github.com/dealii/dealii/pull/15197 #15196: Avoid variables named 'import', part 2. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/15196 #15195: [WIP] Avoid the name 'import' as a function name. (proposed by bangerth) https://github.com/dealii/dealii/pull/15195 #15194: KINSOL: do not copy vectors internally (proposed by sebproell; merged) https://github.com/dealii/dealii/pull/15194 #15193: Remove overhead from AlignedVector in FEFaceNormalEvaluationImpl (proposed by bergbauer; merged) https://github.com/dealii/dealii/pull/15193 #15191: Avoid variables named 'import'. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/15191 #15189: Add a test with an irrecoverable failure of KINSOL. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/15189 #15188: Clean up after ourselves. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/15188 #15187: Catch and rethrow *all* exceptions. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/15187 #15186: Let NOX callbacks conform to our new standard for callback errors. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/15186 ## And this is a list of recently opened or closed discussions: #15234: Documentation not showing up correctly - issue with DEAL_II_CXX20_REQUIRES (opened) https://github.com/dealii/dealii/issues/15234 #15232: Linker fails due to hwloc (opened) https://github.com/dealii/dealii/issues/15232 #15227: Parameter Pattern for list of lists is not parsed correctly (opened and closed) https://github.com/dealii/dealii/issues/15227 #15225: SolutionTransfer: Implement more general interpolation algorithms (opened) https://github.com/dealii/dealii/issues/15225 #15224: Allow vectors in MatrixFree context to skip constrained DoFs (opened) https://github.com/dealii/dealii/issues/15224 #15213: nvcc fatal : A single input file is required for a non-link phase when an outputfile is specified (opened) https://github.com/dealii/dealii/issues/15213 #15201: Potential floating point comparison issue in AffineConstraints<number>::is_consistent_in_parallel (opened) https://github.com/dealii/dealii/issues/15201 #12066: Use N_Vector wrappers in KINSOL interfaces (closed) https://github.com/dealii/dealii/issues/12066 #12025: Fix MatrixFree::find_vector_in_mf for multiple DoFHandler/AffineConstrains (closed) https://github.com/dealii/dealii/issues/12025 #8437: Look over clang-format indentation with many specifiers (closed) https://github.com/dealii/dealii/issues/8437 #7357: SphericalManifold inaccurate/broken (closed) https://github.com/dealii/dealii/issues/7357 #2000: DoFHandler index handling (closed) https://github.com/dealii/dealii/issues/2000 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. 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