\documentclass[11pt,a4paper]{article}
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% isabellesym.sty), use only when needed

%\usepackage{amssymb}
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  %\<lhd>, \<lesssim>, \<greatersim>, \<lessapprox>, \<greaterapprox>,
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%\usepackage{textcomp}
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  %\<currency>

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\urlstyle{rm}
\isabellestyle{it}

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%\renewcommand{\isastyle}{\isastyleminor}


\begin{document}

\title{Allen's Interval Calculus}
\author{Fadoua Ghourabi \\ Ochanomizu University, Japan \\ fadouaghourabi@gmail.com}
\maketitle

\tableofcontents

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\parindent 0pt\parskip 0.5ex

% generated text of all theories
\input{session}

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%\bibliographystyle{abbrv}
%\bibliography{root}

\end{document}

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