Hello everyone! This is deal.II newsletter #196. 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: #13211: Fix a check for zero entries in the lumped mass matrix. (proposed by drwells) https://github.com/dealii/dealii/pull/13211 #13210: Added changelog for p4est installation script. (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/13210 #13209: [9.3] Fix setup script for p4est>=2.3. (proposed by marcfehling) https://github.com/dealii/dealii/pull/13209 #13207: Cleanups in FETools::extrapolate() (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13207 #13206: Fix a bug: Don't reuse buffers for MPI_Isend. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13206 #13204: Remove occurances of /// in source/ (proposed by simonsticko; merged) https://github.com/dealii/dealii/pull/13204 #13203: Convert manual references into bibtex ones in step-43. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13203 #13202: Faster and simpler search for lost particles (proposed by gassmoeller) https://github.com/dealii/dealii/pull/13202 #13201: Do not output the partitioner when pretty-printing Vector objects. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13201 #13200: Updates to step-10 (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13200 #13199: Minor edits to the documentation of SparsityPattern. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13199 #13198: Be more thoughtful about parallel grain sizes in UMFPACK interfaces. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13198 #13197: Document the meaning of jump_in/average_of_* in FEInterfaceValues. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13197 #13196: Add to the documentation of SymmetricTensor::operator*. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13196 #13195: Add movie to step-67 tutorial program (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/13195 #13192: Fix manifold copying on lines when converting hexes to tets. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/13192 #13191: Simplify initialization of block systems in step-21. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13191 #13190: Simplify initialization of block systems in step-20 (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13190 #13189: Fix symbol confusion in step-52. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13189 #13188: Document a part of step-43 that confused @tjhei. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13188 #13187: Fix RemotePointEvalution::marked_vertices for vectors with only false (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13187 #13186: Use better variable names in step-43. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13186 #13185: Provide some overloads and instantiations (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13185 #13184: Fix serialization of empty SparsityPattern objects (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13184 #13183: Simplify some code. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13183 #13182: Add some more index range checks. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/13182 #13181: Extend MeshWorker::ScratchData to support hp (proposed by jppelteret) https://github.com/dealii/dealii/pull/13181 #13180: [9.3] Boost 1.78 (proposed by drwells; merged) https://github.com/dealii/dealii/pull/13180 #13179: OneAPI compatibility: enable oneAPI configuration in CMake, changelog (proposed by tamiko) https://github.com/dealii/dealii/pull/13179 #13178: RemotePointEvalution: pass marked_vertices (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13178 #13177: FEPointEvaluation: fix types for multiple components (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13177 #13176: OneAPI compatibility: fix most of the API incompatibilities (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/13176 #13175: Add a changelog entry. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13175 #13174: Update step-44 documentation. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13174 #13173: VectorTools::point_values(): fix types (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13173 #13172: Use std::string::size() instead of std::string::length(). (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13172 #13170: Add some more tests for iterator filters (proposed by jppelteret; merged) https://github.com/dealii/dealii/pull/13170 #13168: Fix a bug in FE_Face. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13168 #13167: Simplify some code. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13167 #13165: Fix compilation with boost 1.78. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/13165 #13164: Parallelize more operations in the UMFPACK interfaces. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13164 #13163: Fix compilation error. (proposed by adamqc; merged) https://github.com/dealii/dealii/pull/13163 #13159: Extend PreconditionRelaxation (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13159 #13157: Avoid a temp array in the UMFPACK interfaces. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13157 #13156: Also simplify parallel::accumulate_from_subranges() with lambdas. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13156 #13155: Parallelize some functions setting up UMFPACK. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13155 #13152: Refactor PreconditionRelaxation (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/13152 #13150: Avoid implicit bool conversions (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/13150 #13147: Add a bit of documentation to MPI::compute_point_to_point_communication_pattern() (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13147 #13141: Add assertions and a test (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13141 #13082: Better document the NPX algorithm. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/13082 #12987: Make sure MPI BigData objects are always destroyed. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/12987 #12968: Trilinos parallel is_non_negative() function (proposed by juleoc02; merged) https://github.com/dealii/dealii/pull/12968 ## And this is a list of recently opened or closed discussions: #13208: ConsensusAlgorithms interface (opened) https://github.com/dealii/dealii/issues/13208 #13205: Merge SparsityPatternBase into SparsityPattern (opened) https://github.com/dealii/dealii/issues/13205 #13194: p4est installation script cannot find `p4est_config.h` file, causing compilation error (opened) https://github.com/dealii/dealii/issues/13194 #13193: Linker problem when compiling step-20 (opened) https://github.com/dealii/dealii/issues/13193 #13171: Extend MeshWorker::ScratchData to support hp (opened) https://github.com/dealii/dealii/issues/13171 #13169: Compilation Error when Combining IteratorFilter with FEInterfaceValues (opened and closed) https://github.com/dealii/dealii/issues/13169 #13166: We are not yet compatible with SUNDIALS 6.0 (opened) https://github.com/dealii/dealii/issues/13166 #13114: simplex/conv_hex_to_simplex_02 fails with gcc 11.2 (closed) https://github.com/dealii/dealii/issues/13114 #13110: Modernize a small aspect of step-20/21 (closed) https://github.com/dealii/dealii/issues/13110 #13103: Names of FEInterfaceValues functions (closed) https://github.com/dealii/dealii/issues/13103 #13040: weird manifold id settings when converting to simplices (closed) https://github.com/dealii/dealii/issues/13040 #13037: Compatibility with Boost 1.77 and upcoming Boost 1.78 (closed) https://github.com/dealii/dealii/issues/13037 #13030: SparsityPattern serialization causing segfault (closed) https://github.com/dealii/dealii/issues/13030 #12916: SparseDirectUMFPACK does not work correctly with BlockSparseMatrix (closed) https://github.com/dealii/dealii/issues/12916 #12815: Fix typo in step-44 theory documentation (closed) https://github.com/dealii/dealii/issues/12815 #12522: GDB Pretty Printing of Vector depends on deprecated member (closed) https://github.com/dealii/dealii/issues/12522 #12252: Step 66 Update (closed) https://github.com/dealii/dealii/issues/12252 #11320: step-43 uses MPI vectors but doesn't support >1 rank (closed) https://github.com/dealii/dealii/issues/11320 #10476: [Step-52 doc] Consider using a different mathematical variable for one time-step increment (closed) https://github.com/dealii/dealii/issues/10476 #9756: Add a movie to step-67 (closed) https://github.com/dealii/dealii/issues/9756 #9341: [Step-10] Remove long double from example step and improve discussion of round-off errors (closed) https://github.com/dealii/dealii/issues/9341 #6260: operator* for Tensor<2> and SymmetricTensor<2> (closed) https://github.com/dealii/dealii/issues/6260 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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