Hello everyone! This is deal.II newsletter #49. 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: #7220: Fix zeroing of vector in MatrixFree::loop (proposed by kronbichler) https://github.com/dealii/dealii/pull/7220 #7219: add a flag to ParameterHandler to skip undefined fields and subsections (proposed by davydden) https://github.com/dealii/dealii/pull/7219 #7218: Fix undefined reference to some ADNumberTraits static variables. (proposed by jppelteret; merged) https://github.com/dealii/dealii/pull/7218 #7217: Fix GridIn::read_abaqus() for codimension 1 case. (proposed by jppelteret; merged) https://github.com/dealii/dealii/pull/7217 #7215: extend Patterns::Tools::Convert to understand ComponentMask and Funct... (proposed by davydden; merged) https://github.com/dealii/dealii/pull/7215 #7213: Make CUDAWrappers::MatrixFree compile with 64-bit indices (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/7213 #7212: slight modification of step-30 (proposed by gioacchinowang) https://github.com/dealii/dealii/pull/7212 #7210: Do not let doxygen generate XML format. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/7210 #7209: Improve in-code documentation of SymmetricTensor<2,3> inverse. (proposed by jppelteret; merged) https://github.com/dealii/dealii/pull/7209 #7208: Fix a petsc_complex test (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/7208 #7207: Disable '-Og' for gcc (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/7207 #7206: PETscWrappers: Bugfix: use MAT_INPLACE_MATRIX instead of MAT_REUSE_MATRIX (proposed by tamiko) https://github.com/dealii/dealii/pull/7206 #7205: Fixed Typo in Step-42 documentation (proposed by JonMatthewsFCAS; merged) https://github.com/dealii/dealii/pull/7205 #7203: Fix PETSc version detection (proposed by finkandreas; merged) https://github.com/dealii/dealii/pull/7203 #7202: Add TrilinosWrappers::MPI::Vector::import(ReadWriteVector) (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/7202 #7201: install summary.log (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/7201 #7200: Instantiate formatting (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/7200 #7199: Implement SolverSelector constructor mentioned in the documentation (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/7199 #7198: Only declare VectorizedArray::n_array_elements externally if vectorization is enabled (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/7198 #7197: fix warnings in tests (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/7197 #7196: Convert a lot of tests to use initlog(). (proposed by drwells; merged) https://github.com/dealii/dealii/pull/7196 #7194: Improve the message for 'make strip_comments'. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/7194 #7193: Modernize step-52. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/7193 #7192: Deal better with boundary values in step-52. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/7192 #7190: doc: fixes for hdf5 output (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/7190 #7189: Add more options to arpack (proposed by Rombur) https://github.com/dealii/dealii/pull/7189 #7186: Fix VectorTools::project_boundary_values_div_conforming (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/7186 #7185: Fix renumbering in parallel for hp. (proposed by bangerth) https://github.com/dealii/dealii/pull/7185 #7184: De-pluralize a word. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/7184 #7182: Line minimization (proposed by davydden) https://github.com/dealii/dealii/pull/7182 #7181: document LA and distributed namespaces (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/7181 #7180: [WIP] Implement TpetraWrappers::Vector (proposed by masterleinad) https://github.com/dealii/dealii/pull/7180 #7178: Add an assertion. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/7178 #7173: Extend constrained linear operators to work with any LinOp Payload. (proposed by jppelteret; merged) https://github.com/dealii/dealii/pull/7173 #7167: Improve the MatrixFree doxygen formatting (proposed by drwells; merged) https://github.com/dealii/dealii/pull/7167 #7143: Fix parallel quick tests (proposed by drwells; merged) https://github.com/dealii/dealii/pull/7143 #6781: example/step-7: Update indenting and modernize (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/6781 ## And this is a list of recently opened or closed discussions: #7216: No strong scaling / disastrous overhead with Workstream assembly (when using implementation 2, i.e. without graph coloring) (opened) https://github.com/dealii/dealii/issues/7216 #7214: make Functions::ParsedFunction and ParameterAcceptor friends (opened and closed) https://github.com/dealii/dealii/issues/7214 #7211: Undefined references in AD classes when compiling with -O0 (opened and closed) https://github.com/dealii/dealii/issues/7211 #7204: Possible build failure with gcc-6.2 (opened) https://github.com/dealii/dealii/issues/7204 #7195: Add more tests for linear operators in parallel (opened) https://github.com/dealii/dealii/issues/7195 #7191: step-52: Diffusion not working? (opened) https://github.com/dealii/dealii/issues/7191 #7188: Cached find_active_cell_around_point() incompatible with cell iterator of Triangulation in point_gradient() (opened and closed) https://github.com/dealii/dealii/issues/7188 #7187: move internal::VectorDataExchange to a base class which would serve as an interface (opened) https://github.com/dealii/dealii/issues/7187 #7183: Wrapper for the ginkgo numerical linear algebra library. (opened) https://github.com/dealii/dealii/issues/7183 A list of all major changes since the last release can be found at https://www.dealii.org/developer/doxygen/deal.II/changes_after_8_5_0.html. Thanks for being part of the community! Let us know about questions, problems, bugs or just share your experience by writing to dealii@googlegroups.com, or by opening issues or pull requests at https://www.github.com/dealii/dealii. 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