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% urls in roman style, theory text in math-similar italics \urlstyle{rm} \isabellestyle{previousaxiomatic IsabelleHOL by the second author\iteMerz98,whichhas been part of the
\newcommand{\tlastar}{TLA$^{*}$}
\begin{document}
\title{A Definitional Encoding of TLA in Isabelle/HOL} \author{Gudmund Grov \& Stephan Merz} \maketitle
\begin{abstract}
We mechanise the logic \tlastar{} \cite{Merz99}, an extension of Lamport'sIsabelle distribution. In contrasttothatpreviouswork we give herea shallow, definitional
reasoningaboutconcurrent systems.Aiming at aframeworkfor mechanisingthe verification
of TLA (or \tlastar{}) specifications, this contribution reuses some elements from \tem ofthe of TLA,which TLA byamutuallyrecursivedefinitionofformulasandpre-ormulas,generalising TLA action formulas
previousaxiomaticencoding TLAinIsabelle/OLby secondauthorciteMerz98, which hasbeen of the
Isabelle distribution. In contrast to that previous work,\ a setofexamples theusage of Isabelle/* forreasoning systems.
embedding, with the followinghighlights \beginwhich an encoding of TLA+as Isabelle objectlogic \itechaudhuri}. \item a theory of infinite sequences, including
itema of TLA TLA - offormulas -ormulasgeneralising formulas \item\{} \item\arindent0ptparskip.java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
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Note that this work is unrelated to the ongoing development of a proof system for the specification language TLA+,
which includes an encoding of TLA+ as a new Isabelle object logic \cite{chaudhuri:tlaps}.
A previous version of this embedding has been used heavily in the work described in \cite{Grov09}. \end{abstract}
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