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the following added by Hubert 21Jan.
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\begin{document}
\title{Continuous variable entanglement distribution between arbitrary parties }
\date{\today}
\begin{abstract}
\end{abstract}
\maketitle
\section{Introduction}
\label{sec:intro}
\section{Gaussian states}
\label{sec:gaussian}
\section{Distribution of entanglement to three parties}
\subsection{The scheme}
\subsection{Applying the scheme}
\section{Distribution of entanglement between arbitrary number of parties}
\label{sec:generaln}
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