deal.II version 9.7 release

[blais...@gmail.com]

Version 9.7.0 of deal.II, the object-oriented finite element library
awarded the J. H. Wilkinson Prize for Numerical Software and the
SIAM/ACM Prize in Computational Science and Engineering, has been
released. It is available for free under an Open Source license from
the deal.II homepage at

                   https://www.dealii.org/

The major changes of this release are:
  - Three new tutorial programs, showing how to deal with non-local degrees
    of freedom (step-93), matrix-free CutFEM methods (step-95), and curl-curl
    problems (step-97).
  - The introduction of an optimized MappingP1 class for affine mappings
    on simplex elements
  - Improved portability for matrix-free operations through the use of Kokkos
  - Task-based programming support is now based on the Taskflow library, in
    addition to the existing support via the Threading Building Blocks (TBB).
  - Many updates to external libraries, including to Kokkos, MUMPS, PSBLAS,
    Magic Enum, and ArborX, as well as to Trilinos' Tpetra stack.
  - deal.II can now build C++20-style modules.

For more information see:
  - The preprint at https://www.dealii.org/deal97-preprint.pdf
  - The list of more than 120 changes listed at
    https://www.dealii.org/developer/doxygen/deal.II/changes_between_9_6_0_and_9_7_0.html

The main features of deal.II are:
  - Extensive documentation and 88 working example programs
  - Support for dimension-independent programming
  - Locally refined adaptive meshes and multigrid support
  - A zoo of different finite elements
  - Built-in support for shared memory and distributed parallel
    computing, scaling from laptops to clusters with 300,000+ of
    processor cores
  - Interfaces to Trilinos, PETSc, SUNDIALS, UMFPACK and many other
    external software packages
  - Input and output for a wide variety of meshing and visualization
    platforms.

The deal.II developers

[Wolfgang Bangerth]

All:
as a follow-up to the 9.7 release announcement:

To every deal.II release, many many people contribute. The release paper at
https://www.dealii.org/deal97-preprint.pdf
has 16 authors that have contributed in a major way to this release. It
also lists 68 others who have contributed patches, documentation, test
cases, and in other ways to this release -- likely a record for the
number of people who have contributed to a release!

Pasquale Africa,
Henry Arhin,
Alfredo Buttari,
Bruna Campos,
Nicholas Cantrell,
Xiaoming Cao,
Chayapol Chaoveeraprasit,
Jerett Cherry,
Dario Coscia,
John Coughlin,
Nikita Daniliuk,
Crystal Farris,
Marco Feder,
Emmanuel Ferdman,
Federico Fernandez,
Olivier Gaboriault,
Mohamad Ghadban,
Mahdi Gharehbaygloo,
Robin Görmer,
Davit Gyulamiryan,
Lóránt Hadnagy,
Fernando Herrera,
Robin Hiniborch,
Quang Hoang,
Jordan Hoffart,
Sascha Hofstetter,
Yimin Jin,
Yann Jobic,
Sean Johnson,
Vaishnavi Kale,
Sebastian Kinnewig,
Andreas Koch,
Jason Landini,
Zhou Lei,
Yingli Li,
Nils Margenberg,
Oreste Marquis,
Ryan Moulday,
Nils Much,
Tileuzhan Mukhamet,
Wasim~Niyaz Munshi,
Natalia Nebulishvili,
Luz Paz,
David Pecoraro,
Davide Polverino,
Sanjeeb Poudel,
Guilhem Poy,
Laura Prieto~Saavedra,
Sebastian Proell,
Andreas Ritthaler,
Mayank Sabharwal,
Magdalena Schreter,
Richard Schussnig,
Kyle Schwiebert,
Marc Secanell,
Qingyuan Shi,
Wyatt Smith,
Simon Sticko,
Dominik Still,
Edward Terrell,
Jan~Philipp Thiele,
Xiaochuan Tian,
Mikael Vaillant,
Vinayak Vijay,
Stephan Voss,
Simon Wiesheier,
Yi-Yung Yang.

We are grateful for all of these contributions -- thank you! We could
not do all this without you all (in the list above, and on this mailing
list) as a community!

Best
Wolfgang