First distributed version of Group and Ring theory.
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Isabelle
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<p>
<h2>What is Isabelle?</h2>
Isabelle is a popular generic theorem proving environment developed at
Cambridge University (<a
href="http://www.cl.cam.ac.uk/users/lcp/">Larry Paulson</a>) and TU
Munich (<a href="http://www.in.tum.de/~nipkow/">Tobias Nipkow</a>).
<p>
These pages provide general information on Isabelle, more specific
information is available from the local pages
<ul>
<li><a
href="http://www.cl.cam.ac.uk/Research/HVG/Isabelle/cambridge.html"><strong>Isabelle
at Cambridge</strong></a>
<li><a href="http://www4.in.tum.de/proj/theoremprov/group.html"><strong>Isabelle
at Munich</strong></a>
</ul>
See there for information on projects done with Isabelle, mailing list
archives, research papers, the Isabelle bibliography, and Isabelle
workshops and courses.
<p>
<h2>Out now</h2>
The
<a href="dist/<!-- _GP_ distname -->/doc/tutorial.pdf">Tutorial on Isabelle/HOL</a> --
published by Springer Verlag as <a
href="http://www4.in.tum.de/~nipkow/LNCS2283/">LNCS 2283</a>.
<p>
<h2>Obtaining Isabelle</h2>
The <strong><!-- _GP_ distname --></strong> distribution is available
from several <a href="dist/index.html">mirror sites</a>. It includes
source and binary packages and browsable documentation. There is also
a nightly generated <a href="http://isabelle.in.tum.de/devel/">development
snapshot</a> available.
<p>
You can also browse the <a href="library/index.html">Isabelle theory
library</a>; the main logics are <a
href="library/HOL/index.html">HOL</a>, <a
href="library/HOLCF/index.html">HOLCF</a>, <a
href="library/FOL/index.html">FOL</a> and <a
href="library/ZF/index.html">ZF</a>.
<p>
<h2>Mailing list</h2>
Use the mailing list <a href="mailto:
isabelle-users@cl.cam.ac.uk">isabelle-users@cl.cam.ac.uk</a>
and its <a href="ftp://ftp.cl.cam.ac.uk/ml/index.html">archive</a> to
discuss problems and results. Why not <a
href="mailto:lcp@cl.cam.ac.uk">subscribe</a>?