\documentclass[11pt,a4paper]{article}
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\usepackage{isabelle,isabellesym}
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\begin{document}

\title{The Topology of Lazy Lists}
\author{Stefan Friedrich}
\maketitle

\begin{abstract}
This directory contains two theories. The first, 
\isa{Topology}, develops the basic notions of general topology. The second,
\isa{LList\_Topology}, develops the topology of lazy lists.
\end{abstract}

\tableofcontents

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\end{document}