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\newcommand{\mJava}{$\mu$Java}
\begin{document}
\title{\mJava}
\author{Gerwin Klein \\ Tobias Nipkow \\ David von Oheimb \\ Cornelia Pusch}
\maketitle
\begin{abstract}
This formal development defines {\mJava}, a small fragment of the
programming language Java (with essentially just classes), together with a
corresponding virtual machine and a specification of its bytecode verifier.
It is shown that {\mJava} and the given specification of the bytecode
verifier are type-safe.
\end{abstract}
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\end{document}