\documentclass[11pt,a4paper]{article}
\setlength{\textheight}{255mm}
\setlength{\topmargin}{-0.4in}
\usepackage{amssymb}
\usepackage{graphicx}
\usepackage{amsmath}
%%%%%%%%%---------------POSTER-------------%%%%%%%%%%%%%%%%%
\begin{document}
\begin{center}
{\LARGE \textbf{Title of the talk}}
\bigskip
{\small \underline{FIRST AUTHOR'S NAME SURNAME}$^{1}$, SECOND AUTHOR'S NAME SURNAME$^{2}$, THIRD AUTHOR'S NAME SURNAME$^{3}$ }
%The speaker is underlined. The speaker does not need to be the first author.
%All names and surnames are in capitals.
\bigskip
$^1$University, City, Country
$^2$University, City, Country
$^3$University, City, Country
\bigskip
emails: $^1$name@university.edu; $^2$name@university.edu; $^3$name@university.edu
\end{center}
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.
\noindent Here is some equation
\begin{equation}\label{yoursurname:1}
x^{\prime }\left( t\right) =f\left( t,x\left( t\right) \right).
\end{equation}
As a label of (\ref{yoursurname:1}), please, use your surname followed by ":" and a
number of the equation. The same principle use for references, if any, e.g.
\cite{yoursurname:1}, \cite{yoursurname:2} and \cite{yoursurname:3}.
\bigskip
\noindent\textbf{MSC 2010:} 34B05, 34A08 %At least three MSC number are mandatory
\noindent\textbf{Keywords:} Keywords1, keywords2, keywords3, keywords4, keywords5 %At least three keywords are mandatory
\noindent\textbf{Acknowledgement:} %optional
\begin{thebibliography}{9} %optional
%%%% example for a book %%%%%%%%%%%%%
\bibitem{yoursurname:1}
G. Gasper, M. Rahman,
Basic Hypergeometric Series.
\emph{Cambridge University Press, Cambridge}, 1990.
%%%% example for journal's article %%%%%%%%%%%%%%%%%
\bibitem{yoursurname:2}
J. R. Wang, Y. Zhou and M. Fe\v{c}kan,
On recent developments in the theory of boundary value problems for impulsive fractional differential equations.
\emph{Comput. Math. Appl.} \textbf{64} (2012), no. 10, 3008–-3020; doi:10.1016/j.camwa.2011.12.064.
%%%% example for a paper in Proceedings %%%%%%%%%%%%%
\bibitem{yoursurname:3}
M. Rosenblum,
Generalized Hermite polynomials and the Bose-like oscillator
calculus.
In: \emph{Operator Theory: Advances and Applications},
Birkh\"auser, Basel (1994), 369--396.
\end{thebibliography}
\end{document}