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\documentclass[11pt,twoside]{article}
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\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsthm}
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\theoremstyle{plain}
\newtheorem{thm}{Theorem}
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\makeatletter
\renewenvironment{thebibliography}[1]
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\newcommand{\conauthor}[3]{\begin{center}{\bfseries #1 #2}, {\itshape #3}\end{center}\vspace{0\baselineskip}}

\begin{document}

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%%% Here is the place for your abstract (begin) %%%
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\contitle{Here is the title of your abstract. After compiling it will be automatically in capitals}

\conauthor{Firstname}{Surname}{City, Country}

This is a joint work with Prof XY. Here is the text of your abstract. Here is the text of your abstract.
Here is the text of your abstract. Here is the text of your abstract. Here is the text of your abstract.

Here is some equation
\begin{equation}
\label{YourSurname:1}
y'=-f(t,y).
\end{equation}

\begin{thm}
And some theorem, if you want to have one.
\end{thm}

As a label of \eqref{YourSurname:1}, please, use your surname followed by ``:'' and a number of the equation. The same
principle is applied to theorems and references, if any, e.g. \cite{YourSurname:book1} and \cite{YourSurname:article1}.
After compiling the source file, the abstract should not exceed one page of this format.

Abstract should be submitted via email to either hilscher@math.muni.cz or rehak@math.cas.cz\,.
\vskip\baselineskip

{\small
\begin{thebibliography}{9}

\bibitem{YourSurname:book1} P. Hartman,
Ordinary differential equations, John Wiley, New York, 1964.

\bibitem{YourSurname:article1} E. Kamke,
\textit{Zur theorie der systeme gew\"ohnlicher differentialgleichungen, II.}
Acta Math. \textbf{58} (1932), 57--85.

\end{thebibliography}
}

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%%% Here is the place for your abstract (end)   %%%
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\end{document}

