Hello everyone! This is deal.II newsletter #122. 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: #10522: Remove auto from GridTools::exchange_cell_data_to_level_ghosts() (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/10522 #10521: Bugfix: Return a reference to *this in operator= (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/10521 #10520: Clarify docu of GridTools::find_active_cell_around_point() (proposed by nfehn) https://github.com/dealii/dealii/pull/10520 #10519: lac/constraints_move: Fix undefined behavior (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/10519 #10518: mpi/muelu_periodicity: fix test (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/10518 #10517: Fix warning about an unused variable in dof_handler_policy.cc (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/10517 #10516: Merge implementations of exchange_cell_data_to_(level)_ghosts (proposed by peterrum) https://github.com/dealii/dealii/pull/10516 #10514: Tests: Update tests for changes in GridTools::find_active_cell_around_point (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/10514 #10513: Add a changelog entry. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/10513 #10512: Remove a surrounding class that is now no longer necessary. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/10512 #10511: Add alias Triangulation::level_cell_iterator (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/10511 #10510: Add global particles (proposed by luca-heltai) https://github.com/dealii/dealii/pull/10510 #10509: Use usual ++var style. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/10509 #10508: Better describe what we do when running cmake for code gallery programs. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/10508 #10507: Improve tutorial graph layout. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/10507 #10505: improve tests/feinterface/* (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/10505 #10504: Fix a bug in CUDAWrappers::MatrixFree::cell_loop (proposed by Rombur; merged) https://github.com/dealii/dealii/pull/10504 #10503: Add GridTools::exchange_cell_data_to_level_ghosts() (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/10503 #10502: Remove appveyor (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/10502 #10501: Remove % in documentation (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/10501 #10499: [CI] github-actions windows: disable zlib (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/10499 #10498: [CI] windows github actions serial (proposed by tjhei) https://github.com/dealii/dealii/pull/10498 #10497: add a test for multilevel access of FEInterfaceValues (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/10497 #10496: Add missing instantiation for PETSc with complex values (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/10496 #10495: doxygen filter: do not try to link step- without number (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/10495 #10493: [CI] remove references to travis (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/10493 #10492: Document particle_lost in particle handler. (proposed by luca-heltai; merged) https://github.com/dealii/dealii/pull/10492 #10491: [CI] add githubactions indent/documentation check (proposed by tjhei; merged) https://github.com/dealii/dealii/pull/10491 #10490: Give each cell a globally unique (level) ID (proposed by peterrum) https://github.com/dealii/dealii/pull/10490 #10488: Insert particles (proposed by shahabgol) https://github.com/dealii/dealii/pull/10488 #10487: Remove ConstraintMatrix reference (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/10487 #10486: tests/symengine/batch_optimizer: add output variants (proposed by tamiko) https://github.com/dealii/dealii/pull/10486 #10485: Fix a dead link in the top level readme. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/10485 #10484: CMake: Avoid another symbol clash with adol-c (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/10484 #10483: Fix compilation with c++14: add missing instantiation (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/10483 #10482: Step 3 tutorial: problem statement inconsistency (proposed by christophkammer1989; merged) https://github.com/dealii/dealii/pull/10482 #10481: MGTransferPrebuilt custom constraints test (proposed by tcclevenger) https://github.com/dealii/dealii/pull/10481 #10480: Tutorial step 3+4 inconsistency in problem statement (proposed by christophkammer1989) https://github.com/dealii/dealii/pull/10480 #10478: Equip GridTools::find_active_cell_around_point() with tolerance (proposed by nfehn; merged) https://github.com/dealii/dealii/pull/10478 #10477: refactoring of GridTools::find_all_active_cells_around_point() (proposed by nfehn; merged) https://github.com/dealii/dealii/pull/10477 #10475: fixes step-52 doc issue; the correct math expr is sin(x,pi/omega)=0 (proposed by krishnakumarg1984) https://github.com/dealii/dealii/pull/10475 #10473: Last real step fixing AffineConstraints (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/10473 #10471: Update output of test (proposed by masterleinad) https://github.com/dealii/dealii/pull/10471 #10470: Fix more issues found by AddressSanitizer (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/10470 #10469: Fixed default parameters for step-70. (proposed by luca-heltai; merged) https://github.com/dealii/dealii/pull/10469 #10465: Remove unneeded template argument (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/10465 #10458: remove redundant documentation for GridTools::find_active_cell_around_point() functions (proposed by nfehn; merged) https://github.com/dealii/dealii/pull/10458 #10456: Fix bug in find_active_cell_around_point_tolerance() (proposed by nfehn; merged) https://github.com/dealii/dealii/pull/10456 #10453: Fix distribution of levels in pft (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/10453 #10450: Triangulation/DoFHandler: binary incompatibility note (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/10450 #10448: Get rid of TriaObject. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/10448 #10442: Update output of test (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/10442 #10348: Applied user constraints before prolongation in MGTransferPrebuilt (proposed by mathmerizing; merged) https://github.com/dealii/dealii/pull/10348 #10162: Refactor some SD tests (proposed by jppelteret; merged) https://github.com/dealii/dealii/pull/10162 ## And this is a list of recently opened or closed discussions: #10515: test particles/particle_handler_06 is broken (opened and closed) https://github.com/dealii/dealii/issues/10515 #10506: Test failures in find_active_cell_around_point_tolerance (opened and closed) https://github.com/dealii/dealii/issues/10506 #10500: Detangle DEAL_II_WITH_ZLIB and boost::iostreams (opened and closed) https://github.com/dealii/dealii/issues/10500 #10494: [CI] windows github actions quick test link failure (opened and closed) https://github.com/dealii/dealii/issues/10494 #10489: Travis-CI for documentations throws error when DiscreteTime::get_step_number() is called in a step (opened and closed) https://github.com/dealii/dealii/issues/10489 #10479: Remove QuadratureCache from step-62 (opened) https://github.com/dealii/dealii/issues/10479 #10476: [Step-52 doc] Consider using a different mathematical variable for one time-step increment (opened) https://github.com/dealii/dealii/issues/10476 #10474: DataOut::add_data_vector vector handling (opened) https://github.com/dealii/dealii/issues/10474 #10472: Update web page news section. (opened and closed) https://github.com/dealii/dealii/issues/10472 #10462: ThreadLocalStorage needs a move operator= (closed) https://github.com/dealii/dealii/issues/10462 #10449: Memory consumption of p::f::t (closed) https://github.com/dealii/dealii/issues/10449 #10447: Document binary incompatibility of the Triangulation post 9.2 (closed) https://github.com/dealii/dealii/issues/10447 #10284: Bug in AffineConstraintsData (closed) https://github.com/dealii/dealii/issues/10284 #10072: deal.II Release 9.2.0 (released 2020/05/20) (closed) https://github.com/dealii/dealii/issues/10072 #5112: Extend DataOut to output multi-grid vectors (closed) https://github.com/dealii/dealii/issues/5112 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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