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\begin{document}

\title{Fundamental Theorem of Finitely Generated Abelian Groups}
\author{Joseph Thommes, Manuel Eberl}
\maketitle

\begin{abstract}
  This article deals with the formalisation of some group-theoretic results including the
  fundamental theorem of finitely generated abelian groups characterising the structure
  of these groups as a uniquely determined product of cyclic groups.
  Both the invariant factor decomposition and the primary decomposition are covered.

  Additional work includes results about the direct product, the internal direct product
  and more group-theoretic lemmas.
\end{abstract}

\tableofcontents

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\end{document}

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