Quelle  root.tex

\documentclass[a4paper,11pt]{easychair}
\usepackage{amssymb}

\usepackage{isabelle,isabellesym}\isabellestyle{it}

\isadroptag{theory}
\isafoldtag{proof}


\begin{document}

\title{Isabelle document preparation with Easychair {\LaTeX} style}
\titlerunning{Easychair style}
\author{Makarius Wenzel}
\authorrunning{M. Wenzel}
\institute{\url{https://sketis.net}}
\maketitle

\begin{abstract}
Isabelle is a formal document preparation system. This example shows how to
use it together with the Easychair style. See
\url{https://easychair.org/publications/for_authors} for further information.
\end{abstract}

\input{session}

\bibliographystyle{abbrv}
\bibliography{root}

\end{document}