author | Christian Urban <christian dot urban at kcl dot ac dot uk> |
Tue, 08 Jan 2013 01:21:02 +0000 | |
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\documentclass[10pt, conference, compsocconf]{IEEEtran} |
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\usepackage{isabelle} |
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\usepackage{isabellesym} |
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\usepackage{times} |
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\usepackage{amssymb} |
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\usepackage{mathpartir} |
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\usepackage{pdfsetup} |
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% urls in roman style, theory text in math-similar italics |
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\urlstyle{rm} |
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\isabellestyle{it} |
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% for uniform font size |
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%\renewcommand{\isastyle}{\isastyleminor} |
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\begin{document} |
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\title{Formalising Computability Theory in Isabelle/HOL} |
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\author{ |
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\IEEEauthorblockN{Jian Xu, Xingyuan Zhang} |
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\IEEEauthorblockA{PLA University of Science and Technology Nanjing, China} |
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\and |
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\IEEEauthorblockN{Christian Urban} |
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\IEEEauthorblockA{King's College London, UK} |
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} |
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\maketitle |
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\begin{abstract} |
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We present a formalised theory of computability in the |
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theorem prover Isabelle/HOL. This theorem prover is based on classical |
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logic which precludes \emph{direct} reasoning about computability: every |
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boolean predicate is either true or false because of the law of excluded |
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middle. The only way to reason about computability in a classical theorem |
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prover is to formalise a concrete model for computation. |
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We formalise Turing machines and relate them to abacus machines and recursive |
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functions. Our theory can be used to formalise other computability results: |
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we give one example about the undecidability of Wang tilings, whose proof uses |
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the notion of a universal Turing machine. |
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\end{abstract} |
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\begin{IEEEkeywords} |
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Turing Machines, Computability, Isabelle/HOL, Wang tilings |
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\end{IEEEkeywords} |
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\IEEEpeerreviewmaketitle |
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% generated text of all theories |
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\input{session} |
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% optional bibliography |
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\bibliographystyle{abbrv} |
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\bibliography{root} |
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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: |