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\begin{document}

\title{The title}
\author{A.B. FirstAuthor}
\author{C.D. SecondAuthor}

\address{% First author
Department of Mathematics or whatever...\\
University of ...\\
City, Street 77\\
Country}

\email{author1@your.mail.address} % Not mandatory

\address{% Second author
Institute of ...\\
OtherCity, OtherStreet 55\\
OtherCountry}

\email{author2@some.other.address} % Not mandatory

\maketitle


The text itself...

\begin{lemma} % NUMBERED
Let $X$ be a compact Hausdorff topological space\dots
\end{lemma}

\begin{corollary*} % NOT NUMBERED
For all continuous mappings\dots
\end{corollary*}

\begin{theorem} % THEOREMS ARE NUMBERED SEPARATELY
A topological space $X$ is\dots\ if and only if \dots
\end{theorem}

\begin{question*} % AGAIN WITHOUT NUMBER
Is the property\dots\ valid for all\dots?
\end{question*}
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\begin{thebibliography}{99}

\bibitem{Paper}
M. Akian, \emph{Densities of idempotent measures and large deviations},
Trans. Amer. Math. Soc. {\bf 351}(11)
(1999), 4515--4543

\bibitem{Book}
S. MacLane, Categories for the Working Mathematician, 2nd
ed., Springer-Verlag, N.Y., 1998

\bibitem{YetAnotherPaper}
T.N. Radul, \emph{The inclusion hyperspace triple and its
algebras}, Ukr.\ Mat.\ J. {\bf 42}(6) (1990), 806--811 (in
Russian)

\end{thebibliography}

\end{document}
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