Journal/document/root.tex
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\documentclass[acmtocl,final]{acmtrans2m}
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\usepackage{isabelle}
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\usepackage{isabellesym}
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\usepackage{amsmath}
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\usepackage{amssymb}
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\usepackage{tikz}
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\usepackage{pgf}
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\usetikzlibrary{arrows,automata,decorations,fit,calc}
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\usetikzlibrary{shapes,shapes.arrows,snakes,positioning}
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\usepgflibrary{shapes.misc} % LATEX and plain TEX and pure pgf
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\usetikzlibrary{matrix}
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%%%\usepackage{pdfsetup}
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\usepackage{ot1patch}
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\usepackage{times}
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\usepackage{stmaryrd}
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\usepackage{mathpartir}
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\usepackage{longtable}
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\urlstyle{rm}
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\isabellestyle{it}
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\renewcommand{\isastyleminor}{\it}%
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\renewcommand{\isastyle}{\normalsize\it}%
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\newcommand*{\threesim}{%
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  \mathrel{\vcenter{\offinterlineskip
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  \hbox{$\sim$}\vskip-.35ex\hbox{$\sim$}\vskip-.35ex\hbox{$\sim$}}}}
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\def\dn{\,\stackrel{\mbox{\scriptsize def}}{=}\,}
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\renewcommand{\isasymequiv}{$\dn$}
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\renewcommand{\isasymemptyset}{$\varnothing$}
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\renewcommand{\isacharunderscore}{\mbox{$\_\!\_$}}
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\newcommand{\isasymcalL}{\ensuremath{\cal{L}}}
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\newcommand{\isasymbigplus}{\ensuremath{\bigplus}}
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\newcommand{\bigplus}{\mbox{\Large\bf$+$}}
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\newtheorem{thrm}{Theorem}[section]
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\newtheorem{lmm}{Lemma}[section]
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\newtheorem{dfntn}{Definition}[section]
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\newtheorem{prpstn}{Proposition}[section]
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\title{A Formalisation of the Myhill-Nerode Theorem\\ based on Regular
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  Expressions$^\star$}
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%%\thanks{This is a revised and expanded version of \cite{WuZhangUrban11}.}
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\author{Chunhan Wu\\PLA University of Science and Technology Nanjing, China \and
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Xingyuan Zhang\\PLA University of Science and Technology Nanjing, China \and
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Christian Urban\\ King's College London, United Kingdom}
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\markboth{C.~Wu et al.}{A Formalisation of the Myhill-Nerode Theorem based on Regular
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  Expressions}
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\begin{abstract} 
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There are numerous textbooks on regular languages. Many of them focus
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on finite automata for proving properties.  Unfortunately, automata
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are not so straightforward to formalise in theorem provers. The reason
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is that natural representations for automata are graphs, matrices or
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functions, none of which are inductive datatypes. Regular
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expressions can be defined straightforwardly as a datatype and a
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corresponding reasoning infrastructure comes for free in theorem
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provers. We show in this paper that a central result from formal
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language theory---the Myhill-Nerode Theorem---can be recreated using
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only regular expressions. From this theorem many closure properties of
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regular languages follow.
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\end{abstract}
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\category{F.4.1}{Mathematical Logic and Formal Languages}{Mechanical Theorem Proving}
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\category{F.4.3}{Mathematical Logic and Formal Languages}{Formal Languages}
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\terms{Interactive theorem proving, regular languages}
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\keywords{Myhill-Nerode theorem, regular expressions, Isabelle theorem prover}
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\begin{document}
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\begin{bottomstuff}
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Corresponding Author: Christian Urban, Department of Informatics, King's College London, 
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Strand, London WC2R 2LS, UK. Email: christian.urban@kcl.ac.uk.\\
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$^\star$This is a revised and expanded version of \cite{WuZhangUrban11}.
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\end{bottomstuff}
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\maketitle
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\input{session}
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\end{document}
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%%% Local Variables:
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%%% mode: latex
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%%% TeX-master: t
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%%% End: