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A formalization of TLA in HOL -- by Stephan Merz;
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<HTML><HEAD><TITLE>HOL/TLA/README</TITLE></HEAD><BODY bgcolor="white">
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<H3>TLA: A formalization of TLA in HOL</H3>
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Author:     Stephan Merz<BR>
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Copyright   1997 Universit&auml;t M&uuml;nchen<P>
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The distribution contains a representation of Lamport's
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<A HREF="http://www.research.digital.com/SRC/personal/Leslie_Lamport/tla/tla.html">
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Temporal Logic of Actions</A>
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in Isabelle/HOL.
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<p>
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The encoding is mainly oriented towards practical verification
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examples. It does not contain a formalization of TLA's semantics;
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instead, it is based on a 
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<A HREF="doc/PTLA.dvi">complete axiomatization</A> of the "raw"
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(stuttering-sensitive) variant of propositional TLA. It is
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accompanied by a
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<A HREF="doc/design.dvi">design note</A> that explains the basic 
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setup and use of the prover.
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<p>
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The distribution includes the following examples:
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<UL>
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  <li> a verification of Lamport's <quote>increment</quote> example
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  (subdirectory inc),<P>
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  <li> a proof that two buffers in a row implement a single buffer
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  (subdirectory buffer), and<P>
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   <li> the verification of Broy and Lamport's RPC-Memory example. For details see:<BR>
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        Mart&iacute;n Abadi, Leslie Lamport, and Stephan Merz: 
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        <A HREF="http://www4.informatik.tu-muenchen.de/~merz/papers/RPCMemory.html">
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        A TLA Solution to the RPC-Memory Specification Problem</A>.
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        In: <i>Formal System Specification</i>, LNCS 1169, 1996, 21-69.
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</UL>
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If you use Isabelle/TLA and have any comments, suggestions or contributions,
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please contact <A HREF="mailto:merz@informatik.uni-muenchen.de">Stephan Merz</A>.
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