author haftmann
Wed, 21 Sep 2005 16:37:37 +0200
changeset 17563 abb280dd3431
parent 17143 2a8111863b16
child 17661 994d010c0abd
permissions -rw-r--r--
unify dist and main

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        <h2>What is Isabelle?</h2> 
        Isabelle is a popular generic theorem proving environment
        developed at Cambridge University (<a
        href="">Larry Paulson</a>)
        and TU Munich (<a href="">Tobias
        Nipkow</a>).  See the <a href="overview.html">Isabelle
        This site provides general information on Isabelle, more
        specific information is available from the local sites


            <li><a href=""><strong>Isabelle
                  at Cambridge</strong></a></li>

            <li><a href=""><strong>Isabelle
                   at Munich</strong></a></li>


          See there for information on projects done with Isabelle,
          mailing list archives, research papers, the Isabelle
          bibliography, and Isabelle workshops and courses.

        <h2>Coming soon: Isabelle 2005</h2>
         <p>New features in the upcoming Isabelle 2005 will include</p>
                <li>New commands for instantiating locales</li>
                <li>New command for finding theorems (by term patterns, as intro/elim/simp rules, etc.)</li>
                <li>New automatic transitivity reasoner</li>
                <li>New command for ad-hoc theory viewing and printing</li>
                <li>Much extended and improved theory of finite sets</li>
                <li>New syntax that will allow &gt; and &gt;= in addition to &lt; and

        <h2>Isabelle 2004</h2> 

<p>New features in Isabelle 2004 include</p>

<li>New image HOL4 with imported library from HOL4 system on top of
  HOL-Complex (about 2500 additional theorems).</li>

<li>New theory Ring_and_Field with over 250 basic numerical laws, 
  all proved in axiomatic type classes for semirings, rings and fields.</li>

<li>New locale <code>ring</code> for non-commutative rings in HOL-Algebra.</li>

<li>Type <code>rat</code> of the rational numbers available in HOL-Complex.</li>

<li>New theory of matrices with an application to linear programming in HOL-Matrix.</li>

<li>Improved locales (named proof contexts), instantiation of locales.</li>

<li>Improved handling of linear and partial orders in simplifier.</li>
<li>New <code>specification</code> command for definition by specification.</li>  

<li>New Isar command <code>finalconsts</code> prevents constants being given a definition later.</li>  

<li><code>arith</code> now generates counterexamples for reals as well.</li>

<li>New <code>quickcheck</code> command
    to search for counterexamples of executable goals.
  (see HOL/ex/Quickcheck_Examples.thy)</li>
<li>New <code>refute</code> command
    to search for finite countermodels of goals.
  (see HOL/ex/Refute_Examples.thy)

<li>Presentation and x-symbol enhancements, greek letters and
sub/superscripts allowed in identifiers.</li>

<p><a href="//dist/packages/Isabelle/NEWS">[Complete Changelog]</a></p>


The Isabelle distribution is distributed for free under the BSD license.
It includes source and binary packages and browsable documentation,
see the <a href="installation.html">installation instructions</a>. You can also
browse the <a href="//dist/library/index.html">Isabelle theory library</a>

Use the mailing list <a href=
          ""></a> and its
          <a href="">archive</a> to
discuss problems and results.  To subscribe, <a href=
          contact our robot</a>.

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