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<!DOCTYPE HTML>
<html>
<head>
<title>deal.II News</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
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<div class="well">
<h2>News on <abbr>deal.II</abbr></h2>
<dl>
<dt>
<strong>2024/04/17: 11th deal.II users and developers workshop</strong>
</dt>
<dd>
The 11th deal.II Users and Developers Workshop will
take place at Colorado State University, Colorado,
USA, August 12-16, 2024.
For more information, see <a href="workshop-2024">here</a>.
</dd>
<dl></dl>
<dt>
<strong>2024/04/12: Short course in
Chennai, India</strong>
</dt>
<dd>
Wolfgang Bangerth will
teach <a href="https://civil.iitm.ac.in/pcoe/smge/term-course-2024.php">a
short course on the "Finite Element Method in
Scientific Computing"</a> in Chennai,
India, April 29 – May 03, 2024.
</dd>
<dl></dl>
<dt>
<strong style="color:red">2023/07/07: Version 9.5.0 released</strong>
</dt>
<dd>
deal.II version 9.5.0 was released today. A full list of changes can be
found <a href="http://www.dealii.org/developer/doxygen/deal.II/changes_between_9_4_0_and_9_5_0.html">here</a> and a long description of changes
is in the manuscript <a href="deal95-preprint.pdf">here</a>.
Download links are on the <a
href="download.html">download</a> page, or the <a
href="https://github.com/dealii/dealii/releases">release
page on github</a>.
</dd>
<dl></dl>
<dt>
<strong>2023/05/23: 10th deal.II users and developers workshop</strong>
</dt>
<dd>
The 10th deal.II Users and Developers Workshop will take place at Leibniz
University Hannover, Germany, September 11-15, 2023.
For more information, see <a href="workshop-2023">here</a>.
</dd>
<dl></dl>
<dt>
<strong style="color:red">2022/06/23: Version 9.4.0 released</strong>
</dt>
<dd>
deal.II version 9.4.0 was released today. A full list of changes can be
found <a href="http://www.dealii.org/developer/doxygen/deal.II/changes_between_9_3_3_and_9_4_0.html">here</a> and a long description of changes
is in the manuscript <a href="deal94-preprint.pdf">here</a>.
Download links are on the <a
href="download.html">download</a> page, or the <a
href="https://github.com/dealii/dealii/releases">release
page on github</a>.
</dd>
<dl></dl>
<dt>
<strong style="color:red">2021/06/17: Version 9.3.0 released</strong>
</dt>
<dd>
deal.II version 9.3.0 was released today. A full list of changes can be
found <a href="http://www.dealii.org/developer/doxygen/deal.II/changes_between_9_2_0_and_9_3_0.html">here</a> and a long description of changes
is in the manuscript <a href="deal93-preprint.pdf">here</a>.
Download links are on the <a
href="download.html">download</a> page, or the <a
href="https://github.com/dealii/dealii/releases">release
page on github</a>.
</dd>
<dl></dl>
<dt>
<strong>2021/6/18: 9th deal.II
users and developers workshop</strong>
</dt>
<dd>
Given that we can't have in-person workshops this
year, we will have a 1-day public day with talks
discussing what's new in deal.II. For more
information, see <a href="workshop-2021">here</a>.
</dd>
<dl></dl>
<dt>
<strong>2021/5/19: New tutorial programs</strong>
</dt>
<dd>
Over the past year, many new tutorial programs have
been merged -- a total of ten, more than for any
previous release of deal.II!
<br>
Specifically, these are <a href="https://dealii.org/developer/doxygen/deal.II/Tutorial.html">the new
programs</a>:
step-19 introduces particle methods,
and step-68 uses these for tracking locations in a flow
field. step-66 is a matrix-free geometric multigrid solver for a
nonlinear problem. step-71 and step-72 illustrate automatic and
symbolic differentiation. step-77 demonstrates deal.II's SUNDIALS
interfaces to solve a nonlinear problem. step-74 shows the SIPG
approach to discontinuous Galerkin methods. step-76 is an explicit
integrator for the Euler equations. step-78 solves the
Black-Scholes equations, and step-79 solves a topology
optimization problem.
</dd>
<dl></dl>
<dt>
<strong style="color:red">2020/05/20: Version 9.2.0 released</strong>
</dt>
<dd>
deal.II version 9.2.0 was released today. A full list of changes can be
found <a href="http://www.dealii.org/developer/doxygen/deal.II/changes_between_9_1_1_and_9_2_0.html">here</a> and a long description of changes
is in the manuscript <a href="deal92-preprint.pdf">here</a>.
Download links are on the <a
href="download.html">download</a> page, or the <a
href="https://github.com/dealii/dealii/releases">release
page on github</a>.
</dd>
<dl></dl>
<dt>
<strong>2019/05/21: Version 9.1.0 released</strong>
</dt>
<dd>
deal.II version 9.1.0 was released today. A full list of changes can be
found <a href="http://www.dealii.org/developer/doxygen/deal.II/changes_between_9_0_1_and_9_1_0.html"
>here</a> and a long description of changes
is in the manuscript <a href="deal91-preprint.pdf">here</a>.
Download links are on the <a
href="download.html">download</a> page, or the <a
href="https://github.com/dealii/dealii/releases">release
page on github</a>.
</dd>
<dl></dl>
<dt>
<strong>2019/8/3-5: Summer school on Computational Methods for PDEs</strong>
</dt>
<dd>
deal.II, like many other computational math software
projects, is developed by a community that is not very
diverse. In parts to address this, we will run a
summer school targeted primarily at young
scientists from underrepresented groups in our
community. See
<a href="pdeschool-2019">here</a> for more information.
</dd>
<dl></dl>
<dt>
<strong>2019/8/6-9: 7th deal.II
users and developers workshop</strong>
</dt>
<dd>
The 7th deal.II Users and Developers Workshop will be held
in Fort Collins, CO, USA, August 6-9, 2019. For more
information, see <a href="workshop-2019">here</a>.
</dd>
<dl></dl>
<dt>
<strong>2018/07/23-27: 6th deal.II
users and developers workshop</strong>
</dt>
<dd>
The 6th deal.II users and developers workshop happens
in Trieste, Italy, July 23-27, 2018. For more
information, see
<a href="https://indico.sissa.it/event/23/">here</a>
and
<a href="workshop-2018/poster-2018.jpg">here</a>.
</dd>
<dl></dl>
<dt>
<strong style="color:red">2018/05/11: Version 9.0.0 released</strong>
</dt>
<dd>
deal.II version 9.0.0 was released today. A full list of changes can be
found <a href="http://www.dealii.org/developer/doxygen/deal.II/changes_between_8_5_0_and_9_0_0.html"
>here</a> and a long description of changes
is in the manuscript <a href="deal90-preprint.pdf">here</a>.
Download links are on the <a
href="download.html">download</a> page, or the <a
href="https://github.com/dealii/dealii/releases">release
page on github</a>.
</dd>
<dl></dl>
<dt>
<strong>2018/05/07: step-60 - non-matching discretizations</strong>
</dt>
<dd>
The new step-60 example, see
<a href="http://www.dealii.org/developer/doxygen/deal.II/step_60.html">here</a>,
by Luca Heltai and Giovanni Alzetta shows how to deal
with non-matching discretizations defined on different
meshes, and how to use distributed Lagrange
multipliers for this.
</dd>
<dl></dl>
<dt>
<strong>2017/06/17: <abbr>deal.II</abbr> is now part of the
SPEC CPU 2017 benchmark</strong>
</dt>
<dd>
A program based on the <abbr>deal.II</abbr> library is
part of the new industry
standard <a href="http://www.spec.org/cpu2017/" >SPEC CPU 2017</a>
benchmark testsuite that is used to determine the speed of
computers. It is part of the floating point testsuite as
<a href="http://spec.org/cpu2017/Docs/overview.html#benchmarks">
510.parest</a>.
<p>
The inclusion of our software into an industry
standard benchmark testsuite will lead to better support of compilers
and machines for the kind of program we write, in particular for
unstructured hierarchical mesh computations. This will in turn
help make our codes run faster on future systems.
</dd>
<dl></dl>
<dt>
<strong style="color:red">2017/04/06: Version 8.5.0 released</strong>
</dt>
<dd>
deal.II version 8.5.0 was released today. A full list of changes can be
found <a href="http://www.dealii.org/developer/doxygen/deal.II/changes_between_8_4_2_and_8_5_0.html"
>here</a> and a long description of changes
is in the manuscript <a href="deal85-preprint.pdf">here</a>.
Download links are on the <a
href="download.html">download</a> page, or the <a
href="https://github.com/dealii/dealii/releases">release
page on github</a>.
</dd>
<dl></dl>
<dt>
<strong>2017/01/17: step-57 - stationary Navier-Stokes equations</strong>
</dt>
<dd>
The new tutorial program
<a href="http://www.dealii.org/developer/doxygen/deal.II/step_57.html">step-57</a>
(contributed by Liang Zhao and Timo Heister) shows how to solve
the stationary, incompressible Navier-Stokes equations using Newton's
method. The program features block linear solvers for the saddle point
problem and adaptive mesh refinement. The benchmark problem is the famous
lid-driven cavity test.
</dd>
<dl></dl>
<dt>
<strong>2016/07/05: step-55 and step-56 discuss
options for advanced Stokes solvers</strong>
</dt>
<dd>
The new tutorial programs
<a href="http://www.dealii.org/developer/doxygen/deal.II/step_55.html">step-55</a>
(contributed by Timo Heister) and
<a href="http://www.dealii.org/developer/doxygen/deal.II/step_56.html">step-56</a>
(contributed by Ryan Grove) show how the existing
Stokes solver in
<a href="http://www.dealii.org/developer/doxygen/deal.II/step_22.html">step-22</a>
can be extended in parallel and using geometric
multigrid, respectively. step-55 therefore fills a
hole in demonstrating parallel computing at a
complexity level between step-40 (the Laplace
equation) and step-32 (the much more complex
Boussinesq problem). step-56 extends the simple
multigrid solver in step-16 to a vector-valued
problem.
</dd>
<dl></dl>
<dt>
<strong>2016/04/14: Results of the deal.II user survey
available</strong>
</dt>
<dd>
Earlier this year, we asked our users for feedback
about deal.II in a
<a href="http://goo.gl/forms/rMxFdjhqWI">user
survey</a>. The results of this survey are now available
in
this <a href="https://docs.google.com/forms/d/1K2nhtfGuf15Cdw6E4_nbPk82zS9-XNfuRqOjFBWkp7E/viewanalytics">summary
of responses</a>.
</dd>
<dl></dl>
<dt>
<strong style="color:red">2016/03/15: Version 8.4.0 released</strong>
</dt>
<dd>
deal.II version 8.4.0 was released today. A full list of changes can be
found <a href="http://www.dealii.org/developer/doxygen/deal.II/changes_between_8_3_and_8_4.html"
>here</a>.
Download links are on the <a
href="download.html">download</a> page, or the <a
href="https://github.com/dealii/dealii/releases">release
page on github</a>.
</dd>
<dl></dl>
<dt>
<strong>2015/12/07: Deal.II Users and Developers Training
Announcement is out!</strong>
</dt>
<dd>
The deal.II Users and Developers training to be held in
Trieste (Italy) from the 21st to the 24th of March 2016.
More information on
<a href="http://indico.ictp.it/event/7751/overview">the workshop webpage</a>.
</dd>
<dl></dl>
<dt>
<strong>2015/09/01: Users and Developers
Workshop 2015 slides are posted</strong>
</dt>
<dd>
The slides of talks at the Fifth Users and Developers
Workshop are now available at
<a href="workshop-2015/program.html">here</a>.
</dd>
<dl></dl>
<dt>
<strong style="color:red">2015/08/01: Version 8.3 released</strong>
</dt>
<dd>
deal.II version 8.3 was released today. A full list of changes can be
found <a href="http://www.dealii.org/developer/doxygen/deal.II/changes_between_8_2_1_and_8_3.html"
>here</a>.
Download links are on the <a
href="download.html">download</a> page, or the <a
href="https://github.com/dealii/dealii/releases">release
page on github</a>.
</dd>
<dl></dl>
<dt>
<strong>2015/03/10: Users and Developers
Workshop 2015 announcement is out!</strong>
</dt>
<dd>
The Fifth Users and Developers Workshop will happen August
3-7, 2015 in College Station, TX. For more information, see
<a href="workshop-2015/index.html">here</a>. The registration
deadline is April 15, 2015.
</dd>
<dl></dl>
<dt>
<strong style="color:red">2015/01/01: Version 8.2 released</strong>
</dt>
<dd>
deal.II version 8.2 was released today. A full list of changes can be
found <a href="http://www.dealii.org/developer/doxygen/deal.II/changes_between_8_1_and_8_2.html"
>here</a>.
Download links are on the <a
href="download.html">download</a> page, or the <a
href="https://github.com/dealii/dealii/releases">release
page on github</a>.
</dd>
<dl></dl>
<dt>
<strong>2014/11/06: step-54 describes dealing with
OpenCascade geometries</strong>
</dt>
<dd>
<a href="http://www.dealii.org/developer/doxygen/deal.II/step_54.html">step-54</a>
(developed by Andrea Mola and Luca Heltai) demonstrates how to
use existing IGES CAD files to describe the boundary of your
geometry. This is the first example that uses the new support
for the OpenCASCADE (www.opencascade.org)
library.
</dd>
<dl></dl>
<dt>
<strong>2014/10/13: step-52 introduces time steppers </strong>
</dt>
<dd>
<a href="http://www.dealii.org/developer/doxygen/deal.II/step_52.html">step-52</a>
(developed by Bruno Turcksin and Damien Lebrun-Grandie)
explains how to use deal.II's built-in time stepping methods,
including explicit, implicit, and embedded Runge-Kutta methods.
</dd>
<dl></dl>
<dt>
<strong>2014/09/02: step-53 shows complex geometries </strong>
</dt>
<dd>
<a href="http://www.dealii.org/developer/doxygen/deal.II/step_53.html">step-53</a>
demonstrates how to work with the new framework on
deforming meshes contributed by Luca Heltai earlier
this summer. In particular, it shows how to create a
mesh that corresponds to a realistic topography of
eastern Africa, but the techniques shown there are of
course much more broadly applicable.
</dd>
<dl></dl>
<dt>
<strong>2014/07/20: deal.II is now hosted
on github</strong>
</dt>
<dd>
After having used subversion for more than ten years, deal.II
has now moved to a
<a href="https://github.com/dealii/dealii">github
repository</a> to make it simpler for people to
contribute. Links and a brief description of how to get the
development sources from there can be found at the
<a href="/download.html">download page</a>.
</dd>
<dl></dl>
<dt>
<strong style="color:red">2013/12/24: Version 8.1 released</strong>
</dt>
<dd>
deal.II version 8.1 was released today. A full list of changes can be
found <a href="http://www.dealii.org/developer/doxygen/deal.II/changes_between_8_0_and_8_1.html"
>here</a>.
deal.II can be downloaded at
<a href="https://github.com/dealii/dealii/releases">this site</a>.
</dd>
<dl></dl>
<dt>
<strong>2013/12/18: step-26 for the heat equation </strong>
</dt>
<dd>
step-26 fills a long-standing gap: There was no tutorial
program solving the heat equation. There was also no tutorial
showing in relatively easy terms how to do adaptive meshes
in time dependent problems. This program fills both of these
needs.
</dd>
<dl></dl>
<dt>
<strong>2013/11/01: step-42 solves an elasto-plastic contact problem </strong>
</dt>
<dd>
step-42, written by Jörg Frohne, Timo Heister and Wolfgang
Bangerth, shows how to solve an elasto-plastic contact problem.
The program is an extension of step-41 to a much more complex
equation (nonlinear elasto-plasticity) and also demonstrates
how to compute solutions for such problems in parallel.
</dd>
<dl></dl>
<dt>
<strong>2013/10/01: step-51 implements an HDG method </strong>
</dt>
<dd>
step-51, contributed by Martin Kronbichler and Scott Miller,
implements a hybridized discontinuous Galerkin method for the scalar
convection-diffusion equation. The method uses standard DG terms for
describing the element interior but couples the local sub-problems
using face elements. The local contribution is eliminated from the
global linear system by a static condensation process.
</dd>
<dl></dl>
<dt>
<strong style="color:red">2013/07/24: Version 8.0 released</strong>
</dt>
<dd>
deal.II version 8.0 was released today. This is a major new
release, featuring the conversion of the configuration and
build system to <a href="http://www.cmake.org/">CMake</a>,
support for parallel computations with more than 4 billion
unknowns, and many more. A full list of changes can be
found <a href="http://www.dealii.org/developer/doxygen/deal.II/changes_between_7_3_and_8_0.html"
>here</a>.
<br>
deal.II can be downloaded at
<a href="https://github.com/dealii/dealii/releases">this site</a>.
</dd>
<dl></dl>
<dt>
<strong>2013/06/05: 64-bit version of deal.II</strong>
</dt>
<dd>
Because the global dof index variables in deal.II were of type
unsigned int, it was not possible to create a dof_handler with more than
4.3 billions of unknowns. The 64-bit version of deal.II uses unsigned long
long int and thus, allows for 18e18 unknowns.
</dd>
<dl></dl>
<dt>
<strong>2013/03/07: Build system switched to CMake</strong>
</dt>
<dd>
After having used Autoconf as the configuration and build system
since the beginning of deal.II in 1997, we have now switched to
<a href="http://www.cmake.org/">CMake</a>. This implementation,
contributed by Matthias Maier of Heidelberg University, has taken
more than half a year, consists of more than 10,000 lines, and
touches every aspect of the installation process. It provides a more
modern interface to and more reliable way of interacting with other
packages. Furthermore, it no longer relies on shell scripts and
therefore integrates more easily with integrated development
environments as well as Microsoft Windows without Cygwin.
</dd>
<dl></dl>
<dt>
<strong style="color:red">2013/02/27: Version 7.3 released</strong>
</dt>
<dd>
Version 7.3.0 was released today. This release provides one new
tutorial, work on parallel linear algebra, the new FE_Q_DG0 element,
and a large number of enhancements and bug fixes throughout the
entire library. A complete list of new features is
found <a href="http://www.dealii.org/developer/doxygen/deal.II/changes_between_7_2_and_7_3.html"
>here</a>.
</dd>
<dl></dl>
<dt>
<strong style="color:red">2012/09/03: Version 7.2 released</strong>
</dt>
<dd>
Version 7.2.0 was released today. This release provides four
new tutorial programs, a framework for matrix-free
computations, and a large number of enhancements and bug fixes
throughout the entire library. A complete list of new
features is found <a
href="http://www.dealii.org/developer/doxygen/deal.II/changes_between_7_1_and_7_2.html" >here</a>.
</dd>
<dl></dl>
<dt>
<strong>2012/06/06: step-43 — an efficient solver for
two-phase flow</strong>
</dt>
<dd>
The step-21 tutorial program was the first program in the
deal.II tutorial to demonstrate the solution of two-phase flow
problems, but it suffered from the fact that it was very
slow. step-43 demonstrates some of the techniques that can be
used to make solvers for such problems more efficient and
accurate.
</dd>
<dl></dl>
<dt>
<strong>2012/06/03: New step-15</strong>
</dt>
<dd>
Step-15 used to be a program that demonstrated techniques for solving
a rather quirky, nonlinear, 1d problem. It was an interesting problem,
but it served little purpose in teaching deal.II or in demonstrating
nonlinear solution techniques. It has now been replaced by a more
illustrative example, contributed in large part by Sven Wetterauer, in
which we solve the nonlinear elliptic minimal surface equation using a
Newton iteration.
</dd>
<dl></dl>
<dt>
<strong>2012/05/05: Matrix-free implementation framework</strong>
</dt>
<dd>
A matrix-free framework has been contributed by Katharina
Kormann and Martin Kronbichler. The implementation is memory
efficient and includes parallelism via MPI for distributed
meshes, threads for shared-memory computations, and usage of
processors' vector units. The two new tutorial programs step-37
(multigrid solver) and step-48 (nonlinear wave equation with
distributed grid) demonstrate the new features.
</dd>
<dl></dl>
<dt>
<strong>2012/04/02: step-44 — a finite strain
elasticity solver</strong>
</dt>
<dd>
step-44, contributed by Andrew McBride and Jean-Paul
Pelteret, demonstrates one approach to modelling large
deformations of nearly-incompressible elastic solids. The
elastic response is governed by a non-linear, hyperelastic
free-energy function. The geometrical response is also
nonlinear, i.e., the program considers finite deformations.
</dd>
<dl></dl>
<dt>
<strong>2012/04/02: step-41 solves the obstacle problem</strong>
</dt>
<dd>
step-41, a program contributed by Jörg Frohne, shows
how to solve the obstacle problem. This problem describes
the deformation of a body subject to an inequality
constraint that arises from the fact that the deformation is
constrained by contact of the body with some external
obstacle. The program uses the primal-dual active set method
to solve this problem.
</dd>
<dl></dl>
<dt>
<strong style="color:red">2011/10/09: Version 7.1 released</strong>
</dt>
<dd>
Version 7.1.0 was released today. This release provides two
new tutorial programs and many smaller enhancements
throughout the entire library. A complete list of new
features is found <a
href="http://www.dealii.org/developer/doxygen/deal.II/changes_between_7_0_and_7_1.html" >here</a>.
</dd>
<dl></dl>
<dt>
<strong>2011/10/06: step-32, a massively parallel thermal
convection solver</strong>
</dt>
<dd>
Long in the making, the step-32 tutorial program
demonstrates how to solve the Boussinesq equations
describing thermal convection on large numbers of
processors.
</dd>
<dl></dl>
<dt>
<strong>2011/04/30: step-46 demonstrates coupling different models
on different parts of the domain</strong>
</dt>
<dd>
step-46 shows how to couple different models defined on subsets of
the domain, in this case Stokes flow around an elastic solid. The
trick here is that variables (here the flow velocity and pressure,
and the solid displacement) do not live on the entire domain, but
only on a part. The point of the program is how to represent this in
source code.
</dd>
<dl></dl>
<dt>
<strong style="color:red">2011/01/09: Version 7.0 released</strong>
</dt>
<dd>
Version 7.0.0 was released today. This release is a huge step
forward, with several significant new features such as support for
thousands or tens of thousands of processors. A complete list of new
features is found <a
href="http://www.dealii.org/developer/doxygen/deal.II/changes_between_6_3_and_7_0.html" >here</a>.
</dd>
<dl></dl>
<dt>
<strong>2011/01/02: step-38 shows how to solve partial differential
equations on curved manifolds</strong>
</dt>
<dd>
The new step-38 program, contributed by Andrea Bonito and M. Sebastian
Pauletti, shows how to discretize and solve partial differential
equations posed on curved manifolds embedded in higher dimensional
spaces.
</dd>
<dl></dl>
<dt>
<strong>2010/12/20: Graphical frontend to edit parameter files</strong>
</dt>
<dd>
Contributed by Martin Steigemann, deal.II now has Qt based graphical
user interface to edit input parameter files for
the <code>ParameterHandler</code> class. The executable is located in
<code>lib/bin/dealii_parameter_gui</code>.
</dd>
<dl></dl>
<dt>
<strong>2010/10/25: New directory and library structure</strong>
</dt>
<dd>
deal.II has had a somewhat quirky directory and library structure for
historical reasons, but this has now changed: All include and source
files are now under the top-level <code>include/</code>
and <code>source</code> directories. Furthermore, we no longer build a
plethora of libraries but only <code>libdeal_II.g.so</code> (debug
version) and <code>libdeal_II.so</code> (optimized version). In
particular, we no longer build different versions of the library for
different space dimensions.
</dd>
<dl></dl>
<dt>
<strong>2010/10/23: Distributed mesh functionality available</strong>
</dt>
<dd>
After more than 2 years of work by Timo Heister, Martin Kronbichler,
and Wolfgang Bangerth, and with help by Carsten Burstedde, we have
merged a branch on which we have implemented the functionality
necessary to distribute meshes on hundreds, thousands, or more
processors. An overview of the framework
in which this is implemented is presented in a documentation module,
an accompanying paper, as well as in the new step-40 tutorial program.
</dd>
<dl></dl>
<dt>
<strong style="color:red">2010/07/18: Version 6.3.1 released</strong>
</dt>
<dd>
Version 6.3.1 was released today. This release addresses a number of
problems in release 6.3.0 related to compatibility with certain
compilers, operating systems, and versions of external libraries.
A list of changes between
versions 6.3.0 and 6.3.1 can be found <a
href="http://www.dealii.org/developer/doxygen/deal.II/changes_between_6_3_0_and_6_3_1.html" >here</a>.
</dd>
<dl></dl>
<dt>
<strong>2010/06/25: deal.II on Facebook</strong>
</dt>
<dd>
We built a facebook page titled <b>deal.II</b> today. Please, feel free
to join us there!
</dd>
<dl></dl>
<dt>
<strong style="color:red">2010/06/25: Version 6.3 released</strong>
</dt>
<dd>
Version 6.3.0 was released today, containing several new
tutorial programs, a new threading framework and a framework
for assembling linear systems by just providing the local integrals.
A complete list of changes between
versions 6.2.0 and 6.3.0 can be found <a
href="http://www.dealii.org/developer/doxygen/deal.II/changes_between_6_2_and_6_3.html" >here</a>.
</dd>
<dl></dl>
<dt>
<strong>2010/06/24: step-39 solves Poisson's equation with
the interior penalty discontinuous Galerkin method on
adaptively refined meshes with multigrid</strong>
</dt>
<dd>
Using the MeshWorker framework, this program highlights the
fact that loops over meshes are very generic and that
building matrices and level matrices and evaluating error
estimates are really the same task.
</dd>
<dl></dl>
<dt>
<strong> 2010/06/24: The Meshworker framework has been released</strong>
</dt>
<dd>
Using its generic loop and the provided auxiliary classes,
this framework relieves the application programmer from coding
loops over cells, faces, and subfaces, such that focus can remain
on implementation of the local integrals.
</dd>
<dl></dl>
<dt>
<strong>2010/06/23: step-45 shows periodic boundary
conditions</strong>
</dt>
<dd>
Contributed by Markus Bürg, the new tutorial program step-45
demonstrates an often requested feature: periodic boundary
conditions.
</dd>
<dl></dl>
<dt>
<strong>2010/02/13: New multigrid, new step-16</strong>
</dt>
<dd>
Over the last few months, the multigrid implementation has seen
significant rewrites, with much of the work done by Bärbel
Janssen. The goal — now achieved — was to finally fully
support multigrid also for continuous finite elements on adaptively
refined meshes (uniformly refined meshes and discontinuous elements
have worked for a long time). As part of this process, step-16 has
been rewritten and now solves the same problem step-6 solves, just
with a multigrid solver.
</dd>
<dl></dl>
<dt>
<strong>2009/10/07: step-35 shows the solution of the
Navier-Stokes equations</strong>
</dt>
<dd>
Step-35, a tutorial program contributed by Abner
Salgado-Gonzalez, shows an implementation of a projection
scheme for the numerical solution of the Navier-Stokes
equations.
</dd>
<dl></dl>
<dt>
<strong>2009/07/30: New tutorial program step-36</strong>
</dt>
<dd>
The new step-36 tutorial program, contributed by Toby D. Young and
Wolfgang Bangerth, shows how to solve eigenvalue problems, using the
Schrödinger equation as an example.
</dd>
<dl></dl>
<dt>
<strong style="color:red">2009/06/05: Version 6.2.1 released</strong>
</dt>
<dd>
deal.II version 6.2.0 contained a couple of minor but
annoying bugs in its interaction with PETSc. The
documentation package also did not include any typeset
formulas. Release 6.2.1 corrects these mistakes.
A complete list of changes between
versions 6.2.0 and 6.2.1 can be found <a
href="http://www.dealii.org/developer/doxygen/deal.II/changes_between_6_2_0_and_6_2_1.html" >here</a>.
</dd>
<dl></dl>
<dt>
<strong style="color:red">2009/04/27: Version 6.2 released</strong>
</dt>
<dd>
Version 6.2.0 was released today!
A complete list of changes between
versions 6.1.0 and 6.2.0 can be found <a
href="http://www.dealii.org/developer/doxygen/deal.II/changes_between_6_1_and_6_2.html" >here</a>.
</dd>
<dl></dl>
<dt>
<strong>2009/04/14: New tutorial program step-34</strong>
</dt>
<dd>
step-34, written by Luca Heltai, demonstrates the ability of
deal.II to discretize and solve boundary integral equations
on curved manifolds.
</dd>
<dl></dl>
<dt>
<strong>2008/12/05: Support for meshes embedded in
higher dimensions</strong>
</dt>
<dd>
Based on work by Cataldo Manigrasso and Luca Heltai
developed over the last few months on a branch, deal.II now
supports meshes that are embedded in higher space
dimensions. This allows, for example, to solve equations on
the surface of a sphere (e.g. to use boundary element
methods for exterior problems).
</dd>
<dl></dl>
<dt>
<strong>2008/11/14: New tutorial program step-31</strong>
</dt>
<dd>
The latest tutorial program, step-31, is contributed by
Martin Kronbichler and Wolfgang Bangerth and shows the
solution of the Boussinesq approximation to thermally driven
convection in an incompressible fluid.
</dd>