libraries exist</a>
<li> <a href="#windows">Can I use <acronym>deal.II</acronym> on a
Windows platform?</a>
+ <li> <a href="#mac">Can I use <acronym>deal.II</acronym> on an
+ Apple MacIntosh?</a>
<li> <a href="#parallel">Does <acronym>deal.II</acronym> support parallel
computing?</a>
<li> <a href="#perl-bug">I can't build the online documentation under Cygwin!</a>
<li> <a href="#problem-howto">How do I solve problem XXX with
<acronym>deal.II</acronym>?</a>
<li> <a href="#problem-complex">Can I solve problems over complex numbers?</a>
- <li> <a href="#time-dependent">There is no tutorial program for
- time-dependent problems!</a>
<li> <a href="#contribute">I want to contribute to the development
of <acronym>deal.II</acronym>!</a>
</ol>
- <h3><a name="nodata">
+<dl>
+ <dt><a name="nodata">
I tried to install deal.II on system X and it does not work.
- </a></h3>
+ </a></dt>
+ <dd>
<p>
Even if people reading this list and especially people managing this list
belong to the most able programmers in the universe (and a decent number of
wrong, paste the error message into your email. If appropriate, add lines
from the file producing the error.
</p>
+ </dd>
+
<a name="compiler"></a>
- <h3>How do I change the compiler?</h3>
+ <dt>How do I change the compiler?</dt>
+ <dd>
<p>
<acronym>deal.II</acronym> can be compiled by a number of compilers
without problems (see the section <a
</p>
+ </dd>
+
- <
h3><a name="gfortran">
+ <
dt><a name="gfortran">
I cannot link with BLAS or LAPACK even if the libraries exist
- </a></h3>
+ </a></dt>
+ <dd>
<p>This is probably due to the introduction of the new GNU FORTRAN
Compiler <tt>gfortran</tt>. If those libraries were compiled with
<tt>gfortran</tt> and you have the old <tt>g77</tt> installed, then
test for BLAS to see if it complains about missing symbols
indicating such a thing. If so, install the missing compiler.
</p>
+ </dd>
+
Can I use <acronym>deal.II</acronym> on a Windows platform?
- </a></h3>
+ </a></dt>
+ <dd>
<p>
First the good news: yes, you can. Still, this answer needs to be
more specific. The configuration program for
</p>
- <h4>Other Windows compilers</h4>
+ <h6>Other Windows compilers</h6>
<p>
As long as a compiler is sufficiently standards conforming, and has
a command line interface, it may be used to compile the library. In
</p>
+ </dd>
+
- <
h3><a name="perl-bug">
+ <
dt><a name="perl-bug">
I can't build the online documentation under Cygwin!
- </a></h3>
+ </a></dt>
+ <dd>
<p>
The Perl utility from Cygwin distribution (up to version 5.6.1-2)
contains a bug that causes a "permission denied" error with in-place
patch to the source code of the perl utility and recompile.
</p>
+ </dd>
+
- <
h3><a name="cygwin-shared">
+ <
dt><a name="cygwin-shared">
My program compiles and links under Cygwin, but it issues a
run-time error saying that <code>libXXX.DLL</code> cannot
be found!
- </a></h3>
+ </a></dt>
+ <dd>
<p>
With Version 5.1.0, <acronym>deal.II</acronym> creates and uses shared
libraries (DLLs) under cygwin. These DLLs will be linked to your program
</p>
+ </dd>
+
- <h3><a name="parallel">
+ <dt><a name="mac">
+ Can I use <acronym>deal.II</acronym> on an Apple MacIntosh?
+ </a></dt>
+
+ <dd>
+ <p>
+ Yes, at least on the more modern OS X operating systems this works
+ just fine, as long as the developer tools like the GCC compiler,
+ PERL, etc are installed. The only issue we are currently aware of is
+ that if <acronym>deal.II</acronym> is configured to interface with
+ PETSc, then PETSc needs to be configured with the
+ <code>--with-x=0</code> flag to prevent linking in the X11 libraries
+ (you probably won't need them anyway).
+ </p>
+
+ </dd>
+
+
+ <dt><a name="parallel">
Does <acronym>deal.II</acronym> support parallel computing?
- </a></h3>
+ </a></dt>
+ <dd>
<p>
Yes. If you use the <code>--with-multithreading
--enable-multithreading</code> flags when you run <code>./configure</code>
METIS, refer to the <a href="readme.html">readme file</a>.
</p>
+ </dd>
+
<a name="triangles"></a>
- <h3>Can I use/implement triangles/tetrahedra in
- <acronym>deal.II</acronym>?</h3>
+ <dt>Can I use/implement triangles/tetrahedra in
+ <acronym>deal.II</acronym>?</dt>
+ <dd>
<p>
- No, you cannot do either. The basic data structures are too much
+ No, you can't. The basic data structures are too much
tailored to quadrilaterals and hexahedra. Implementing other cells
amounts to re-implementing nearly all grid and DoF classes from
scratch. On the other hand, the restriction to quadrilaterals and
</p>
+ </dd>
+
<a name="problem-types"></a>
- <h3>Can I solve problem XXX with <acronym>deal.II</acronym>?</h3>
+ <dt>Can I solve problem XXX with <acronym>deal.II</acronym>?</dt>
+ <dd>
<p>
The simple answer is: if it can be written as a PDE, then this is
- possible. The more complicated answer is: <acronym>deal.II</acronym>
+ possible as evidenced by the many <a
+ href="publications/toc.html">publications</a> in widely disparate
+ fields obtained with the help of <acronym>deal.II</acronym>. The
+ more complicated answer is: <acronym>deal.II</acronym>
is not a problem-solving environment, it is a toolbox that supports
you in solving a PDE by the method of finite elements. You will have
to implement assembling matrices and right hand side vectors
project added to this page, just contact us.
</p>
+ </dd>
+
<a name="problem-howto"></a>
- <h3>How do I solve problem XXX
- with <acronym>deal.II</acronym>?</h3>
+ <dt>How do I solve problem XXX
+ with <acronym>deal.II</acronym>?</dt>
+ <dd>
<p>
There is no general rule on how to attack implementing a program to
solve your particular problem. However, the way most often taken is
how to program with <acronym>deal.II</acronym>.
</p>
+ </dd>
+
<a name="problem-complex"></a>
- <h3>Can I solve problems over complex numbers?</h3>
+ <dt>Can I solve problems over complex numbers?</dt>
+ <dd>
<p>
Yes, you can, and it has been done numerous times with
<acronym>deal.II</acronym>. However, we have a standard
about which solver may be adequate for it.
</p>
-
- <a name="time-dependent"></a>
- <h3>There is no tutorial program for
- time-dependent problems!</h3>
-
- <p>
- While there are a number of projects in which deal.II is used to
- write solvers for time-dependent problems, there is indeed no
- tutorial program showing this. The reason for this is two-fold:
- first, writing tutorial programs takes awfully long, on the order of
- at least one full work week, and a time-dependent program would
- likely be large and complex so may even take longer. These days, the
- main authors of the library unfortunately lack the time for projects
- of this size unless it would be directly related to one of their
- ongoing projects, and would therefore be a side-product of what they
- do anyway.
- </p>
-
- <p>
- The second reason is that over time we have found out that there is
- not much common ground in time-dependent solvers: most of our
- time-dependent projects build on deal.II serve very different
- purposes, from research into error estimators to solving actual
- engineering problems. They may change the mesh between each
- successive step, once in a while, or never. They may use explicit or
- implicit time stepping schemes. Since they differ in so many
- aspects, there are only few aspects specific to their
- time-dependentness that can be moved to the library, and example
- programs would be very different depending on the purpose for which
- it was written. Furthermore, unlike most of the other tutorial
- programs, it may not serve as a template for your own project unless
- it happens to have the same objectives. It may therefore not be
- terribly useful to a lot of people.
- </p>
-
- <p>
- That said, if someone has a nice program to contribute as an example
- program: we would be delighted to take it in!
- </p>
+ </dd>
<a name="contribute"></a>
- <h3>I want to contribute to the development
- of <acronym>deal.II</acronym>!</h3>
+ <dt>I want to contribute to the development
+ of <acronym>deal.II</acronym>!</dt>
+ <dd>
<p>
<acronym>deal.II</acronym> is Open Source -- this not only implies
that you as everyone else has access to the source codes, it also
interesting to others, there most probably is a way to get it into
the library!
</p>
+ </dd>
+
+</dl>
</body>
</html>
projects / dealii-svn.git / commitdiff