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<?xml version='1.0' encoding='iso-8859-1' ?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<!-- $Id$ -->
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>Isabelle</title>
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<?include file="//include/htmlheader.include.html"?>
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</head>
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<body class="main">
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<?include file="//include/header.include.html"?>
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<div class="hr"><hr/></div>
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<?include file="//include/navigation.include.html"?>
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<div class="hr"><hr/></div>
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<div id="content">
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<h2>What is Isabelle?</h2>
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<p>
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Isabelle is a popular generic theorem proving environment
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developed at Cambridge University (<a
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href="http://www.cl.cam.ac.uk/users/lcp/">Larry Paulson</a>)
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and TU Munich (<a href="http://www.in.tum.de/~nipkow/">Tobias
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Nipkow</a>). See the <a href="overview.html">Isabelle
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overview</a>.
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</p>
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<p>
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This site provides general information on Isabelle, more
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specific information is available from the local sites
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</p>
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<ul>
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<li><a href="http://www.cl.cam.ac.uk/Research/HVG/Isabelle/cambridge.html"><strong>Isabelle
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at Cambridge</strong></a></li>
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<li><a href="http://www4.in.tum.de/proj/theoremprov/group.html"><strong>Isabelle
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at Munich</strong></a></li>
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</ul>
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<p>
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See there for information on projects done with Isabelle,
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mailing list archives, research papers, the Isabelle
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bibliography, and Isabelle workshops and courses.
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</p>
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<h2>Now available: Isabelle 2005</h2>
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<p>Some notable highlights:</p>
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<ul>
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<li>Interpretation of locale expressions in theories, locales, and proof contexts.</li>
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<li>Substantial library improvements (HOL, HOL-Complex, HOLCF).</li>
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<li>Proof tools for transitivity reasoning.</li>
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<li>General <code>find_theorems</code> command (by term patterns, as intro/elim/simp rules etc.).</li>
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<li>Commands for generating adhoc draft documents.</li>
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<li>Support for Unicode proof documents (UTF-8).</li>
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<li>Major internal reorganizations and performance improvements.</li>
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</ul>
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<p><a href="//dist/packages/Isabelle/NEWS">[Cumulative NEWS]</a></p>
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<h2>Download</h2>
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<p>
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Isabelle is distributed for free under the BSD license. It includes
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source and binary packages and browsable documentation, see the <a
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href="installation.html">installation instructions</a>. You can also
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browse the <a href="//dist/library/index.html">Isabelle theory
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library</a> online.
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</p>
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<p>
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Use the mailing list <a href=
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"mailto:isabelle-users@cl.cam.ac.uk">isabelle-users@cl.cam.ac.uk</a> and its
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<a href="http://www.cl.cam.ac.uk/users/lcp/archive/">archive</a> to
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discuss problems and results. To subscribe, <a href=
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"mailto:Cl-isabelle-users-request@lists.cam.ac.uk?subject=subscribe">
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contact our robot</a>.
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</p>
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</div>
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<div class="hr"><hr/></div>
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<?include file="//include/footer.include.html"?>
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</body>
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</html>
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