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<h1 id="sec2" class="chapter">Chapter 1  Introduction</h1>
<p><span style="font-variant:small-caps">FreeFEM</span> is an implementation of the <span style="font-weight:bold">Gfem</span> language dedicated
to the finite element method. It provides you a way to solve Partial
Differential Equations (PDE) simply. Although you can solve quite complicated
problems can be solved also.
</p><p>In this manual we are going to describe the <span style="font-variant:small-caps">FreeFEM</span> package:
</p><ul class="itemize"><li class="li-itemize">
Compilation step
</li><li class="li-itemize">How to use the language
</li><li class="li-itemize">A quick presentation of how it is done
</li></ul>
<h2 id="sec3" class="section">1.1  Conventions</h2>
<p>
<a id="sec:conventions"></a></p><ul class="itemize"><li class="li-itemize">A <span style="font-weight:bold">triangulation</span><a id="hevea_default0"></a>, T, is a set of triangles covering a domain
refered later as Ω</li><li class="li-itemize">Each <span style="font-weight:bold">vertex</span><a id="hevea_default1"></a> has a number <span style="font-weight:bold">iv</span>, a region reference number
<span style="font-weight:bold">region</span>, and a boundary reference number <span style="font-weight:bold">ib</span> which is zero for
internal points.</li><li class="li-itemize">An <span style="font-weight:bold">array-function</span><a id="hevea_default2"></a> is an array of values on the vertices of T. It
represents a piecewise linear continuous (or discontinuous if
<code>precise</code> is used) function on Ω.</li><li class="li-itemize">In an integrated environment <span style="font-weight:bold">Gfem</span> has the notion of Project: files
shown on the desktop as documents with an icon like a triangulated
rectangle (on the Macintosh).</li><li class="li-itemize">A <span style="font-weight:bold">project</span><a id="hevea_default3"></a> contains a program, the last triangulation created and one
array function, namely the last function displayed.</li></ul>
<h2 id="sec4" class="section">1.2  Software and Documentation</h2>
<p>
<a id="sec:soft"></a></p><p><span style="font-variant:small-caps">FreeFEM</span> is available on Internet. Check the following http<a id="hevea_default4"></a> site:
</p><div class="center">
kfem.sourceforge.nethttp://kfem.sourceforge.net
</div><p>
The tarball uses the following naming convetion:
<span style="font-family:monospace">freefem-x.x.x.tar.gz</span></p><p>Others documentations are available on the <span style="font-variant:small-caps">FreeFEM</span> Web site. These
might provide further enlightment on the software.</p>
<h5 id="sec5" class="paragraph">AUTHORS</h5>
<p>
The authors are, in alphabetical order:
</p><ul class="itemize"><li class="li-itemize">
Dominique Bernardi <span style="font-family:monospace"><??></span>
</li><li class="li-itemize">Frederic Hecht <span style="font-family:monospace"><Frederic.Hecht@inria.fr></span>mailto:Frederic.Hecht@inria.fr
</li><li class="li-itemize">Castro J. Manollo <span style="font-family:monospace"><castro@gamba.cie.uma.es></span>mailto:castro@gamba.cie.uma.es
</li><li class="li-itemize">Pascal Parole <span style="font-family:monospace"><pascal@area-mundi.fr></span>mailto:pascal@area-mundi.fr
</li><li class="li-itemize">Olivier Pironneau <span style="font-family:monospace"><pironneau@ann.jussieu.fr></span>mailto:pironneau@ann.jussieu.fr
</li><li class="li-itemize">Christophe Prud’homme <span style="font-family:monospace"><prudhomm@users.sourceforge.net></span>mailto:prudhomm@users.sourceforge.net
</li></ul><p>If you are interested in <span style="font-variant:small-caps">FreeFEM</span> have a look at the web site
kfem.sourceforge.nethttp://kfem.sourceforge.net. You can subscribe to various
mailing lists and get the latest stuff from the <span style="font-variant:small-caps">FreeFEM</span> world.</p>
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