Hello everyone!

This is deal.II newsletter #52.
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:

#7330: ScaLAPACKMatrix: improve documentation (proposed by BenBrands) 
https://github.com/dealii/dealii/pull/7330

#7329: use std::string instead of char * (proposed by BenBrands) 
https://github.com/dealii/dealii/pull/7329

#7327: Added cell->is_locally_owned() in project_boundary_values_div_conforming 
(proposed by JonMatthewsFCAS) https://github.com/dealii/dealii/pull/7327

#7325: Minor doc update to class parallel::CellWeights. (proposed by bangerth; 
merged) https://github.com/dealii/dealii/pull/7325

#7322: Tests: Fix race condition between mpi and non-mpi variants (proposed by 
tamiko; merged) https://github.com/dealii/dealii/pull/7322

#7320: Fixes compilation issues when using altivec vectorization. (proposed by 
dsambit; merged) https://github.com/dealii/dealii/pull/7320

#7319: Disallow C++17 support when compiling with CUDA 10 (proposed by 
masterleinad; merged) https://github.com/dealii/dealii/pull/7319

#7317: Tests: fe/fe_enriched_color_07 - use a better preconditioner (proposed 
by tamiko; merged) https://github.com/dealii/dealii/pull/7317

#7316: Tests: base/reference.cc - avoid "use after scope" (proposed by tamiko; 
merged) https://github.com/dealii/dealii/pull/7316

#7313: Tests: base/utilities_13.cc - workaround for clang (proposed by tamiko; 
merged) https://github.com/dealii/dealii/pull/7313

#7312: Tests: base/utilities_13 - avoid an arithmetic exception with clang 
(proposed by tamiko) https://github.com/dealii/dealii/pull/7312

#7311: Restrict examples that require a working FunctionParser class (proposed 
by masterleinad; merged) https://github.com/dealii/dealii/pull/7311

#7310: add DynamicSparsityPattern::compute_Tmmult_pattern() by moving existi... 
(proposed by davydden; merged) https://github.com/dealii/dealii/pull/7310

#7307: Only declare FunctionParser if there is muparser support (proposed by 
masterleinad) https://github.com/dealii/dealii/pull/7307

#7305: Make 'CellWeights' available for any 'p::Triangulation'. (proposed by 
marcfehling; merged) https://github.com/dealii/dealii/pull/7305

#7304: Refactored FECollection::find_least_face_dominating_fe_in_collection(). 
(proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/7304

#7303: Allow using CUDA-aware MPI (proposed by masterleinad) 
https://github.com/dealii/dealii/pull/7303

#7302: ScaLAPACKMatrix::reinit() and one constructor: pass shared_ptr by value 
(proposed by BenBrands; merged) https://github.com/dealii/dealii/pull/7302

#7301: add constructor for ScaLAPACKMatrix (proposed by BenBrands; merged) 
https://github.com/dealii/dealii/pull/7301

#7299: Fix DEAL_II_MPI_CONST_CAST (proposed by masterleinad; merged) 
https://github.com/dealii/dealii/pull/7299

#7298: Fix clang-tidy complaints (proposed by masterleinad; merged) 
https://github.com/dealii/dealii/pull/7298

#7295: Boost rtree wrapper (proposed by luca-heltai; merged) 
https://github.com/dealii/dealii/pull/7295

#7291: [9.0.1] Redo #6658 (proposed by masterleinad; merged) 
https://github.com/dealii/dealii/pull/7291

#7290: Update the documentation of FECollection::find_last...(). (proposed by 
bangerth; merged) https://github.com/dealii/dealii/pull/7290

#7289: [9.0.1] Redo #6929 (proposed by masterleinad; merged) 
https://github.com/dealii/dealii/pull/7289

#7288: Do not use deprecated function Threads::this_thread_id(). (proposed by 
bangerth; merged) https://github.com/dealii/dealii/pull/7288

#7286: [9.0.1] Redo #7270 (proposed by tamiko; merged) 
https://github.com/dealii/dealii/pull/7286

#7285: Deprecate Threads::n_existing_threads() and Threads::this_thread_id(). 
(proposed by bangerth; merged) https://github.com/dealii/dealii/pull/7285

#7284: Introduced FECollection::find_most_face_dominating_fe_in_subset(). 
(proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/7284

#7283: Refactor AD drivers helper base 01 (proposed by jppelteret) 
https://github.com/dealii/dealii/pull/7283

#7280: add inverse_Hilbert_space_filling_curve (proposed by davydden; merged) 
https://github.com/dealii/dealii/pull/7280

#7279: [9.0.1] Take over #6769 (proposed by masterleinad; merged) 
https://github.com/dealii/dealii/pull/7279

#7278: Update author list of hp::DoFHandler. (proposed by bangerth; merged) 
https://github.com/dealii/dealii/pull/7278

#7277: Add a test for the parallel hp implementation. (proposed by bangerth; 
merged) https://github.com/dealii/dealii/pull/7277

#7275: Add a variadic constructor to hp::QCollection. (proposed by bangerth; 
merged) https://github.com/dealii/dealii/pull/7275

#7274: Make documentation of hp::FECollection clearer. (proposed by bangerth; 
merged) https://github.com/dealii/dealii/pull/7274

#7272: Set vertex ownership based on FE domination. (proposed by marcfehling) 
https://github.com/dealii/dealii/pull/7272

#7268: adapt block size in save_parallel (proposed by BenBrands; merged) 
https://github.com/dealii/dealii/pull/7268

#7264: Introduced CellWeights class for load balancing by the number of DoFs. 
(proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/7264

#7259: use const cast for old OpenMPI version (proposed by tjhei; merged) 
https://github.com/dealii/dealii/pull/7259

#6754: Fix normal_vector crash for small cells (proposed by tjhei; merged) 
https://github.com/dealii/dealii/pull/6754

#6629: Implement VectorizedArray for Altivec/VSX (IBM Power) (proposed by 
kronbichler; merged) https://github.com/dealii/dealii/pull/6629


## And this is a list of recently opened or closed discussions:

#7331: Problems with step-16 (opened) 
https://github.com/dealii/dealii/issues/7331

#7328: Compilation fails when DEAL_II_WITH_CUDA is combined with ALTIVEC 
vectorization (opened) https://github.com/dealii/dealii/issues/7328

#7326: Support new gmsh-4 mesh format (opened) 
https://github.com/dealii/dealii/issues/7326

#7324: Cannot configure deal.II 9.0.0 with custom Boost on Windows (opened) 
https://github.com/dealii/dealii/issues/7324

#7323: Header files for x86 SIMD (opened) 
https://github.com/dealii/dealii/issues/7323

#7321: Outdated comment in vectorization.h (opened) 
https://github.com/dealii/dealii/issues/7321

#7318: Tests: Changing the floating point environment in tests without setting 
FENV_ACCESS results in undefined behavior (opened) 
https://github.com/dealii/dealii/issues/7318

#7315: Request cell weighting functionality for Zoltan with p::s::Triangulation 
(opened) https://github.com/dealii/dealii/issues/7315

#7314: base/reference.debug - stack-use-after-scope causes segfault with clang 
(opened and closed) https://github.com/dealii/dealii/issues/7314

#7309: consistently use std::string for filenames (opened) 
https://github.com/dealii/dealii/issues/7309

#7308: fe/fe_enriched_color_07.mpirun=2.debug fails on (almost) every 
configuration (opened and closed) https://github.com/dealii/dealii/issues/7308

#7306: Open CASCADE macro interferring CUDA::Handle (opened) 
https://github.com/dealii/dealii/issues/7306

#7300: OpenMP as an alternative to TBB (opened) 
https://github.com/dealii/dealii/issues/7300

#7297: Meta issue for deal.II 6th Users and Developers workshop. (opened and 
closed) https://github.com/dealii/dealii/issues/7297

#7296: GridOut::write_vtk no longer useful (opened) 
https://github.com/dealii/dealii/issues/7296

#7294: mention how to use pArpack (opened) 
https://github.com/dealii/dealii/issues/7294

#7293: Fails to find the ADOL-C library: no matching conversion for static_cast 
from 'const adouble' to 'double' (opened and closed) 
https://github.com/dealii/dealii/issues/7293

#7292: Doesn't link with arpack (opened and closed) 
https://github.com/dealii/dealii/issues/7292

#7287: Rename hp::FECollection::find_least_face_dominating_fe() (opened and 
closed) https://github.com/dealii/dealii/issues/7287

#7282: 9.0.1 release (opened) https://github.com/dealii/dealii/issues/7282

#7281: Extend CellWeights class to parallel::shared::Triangulation (opened and 
closed) https://github.com/dealii/dealii/issues/7281

#7276: Feature request: import ABAQUS inp file for 3D beam elements (spacedim = 
3, dim = 1) (opened) https://github.com/dealii/dealii/issues/7276

#7273: hp::DoFHandler does not set active_fe_index on coarsened cells. (opened) 
https://github.com/dealii/dealii/issues/7273

#7267: package.py says that arpack depends on MPI, but configure says that it 
depends on lapack (closed) https://github.com/dealii/dealii/issues/7267


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 [email protected], or by opening issues or pull requests at 
https://www.github.com/dealii/dealii.
Additional information can be found at https://www.dealii.org/.

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