 % The whole document should not exceed one page!

\documentclass[11pt,a4paper]{article}
  \newcommand{\Title}[1]{{\large\bf \uppercase{#1}}}
  \newcommand{\Email}[1]{\\
    \smallskip {\small e-mail:} \textnormal{#1}}
  \newcommand{\Author}[2]{{\sc #1} \\
    \medskip
    {\small\it #2}}
  \renewenvironment{abstract}{}

\pagestyle{empty}
\begin{document}

    \begin{center}
    \Title{Title of the talk}

% In case there is more than one author, the speaker ought to be underlined.
% Here there an example, when the affiliation of all authors is the same.
    %   \bigskip
    %   \Author{Janina Nowak, \underline{Piotr Nowak} and Ryszard Malinowski}
    %   {Rzeszow University of Technology}
    %
    %   \Email{jano@prz.edu.pl, pino@prz.edu.pl, ryma@prz.edu.pl}

% If the affiliation of the authors differ, use the following schema:
    \bigskip
    \Author{Janina Nowak, \underline{Piotr Nowak}}
     {Rzeszow University of Technology}
    \Email{jano@prz.edu.pl, pino@prz.edu.pl}

    \medskip
    \Author{Ryszard Malinowski}
     {University of Antarctica}
    \Email{ryma@anta.com}
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \end{center}

\medskip
    \begin{abstract}
    Write your abstract in here.
    
    \end{abstract}
\medskip

    \begin{thebibliography}{99}
    \bibitem{HH} P. Erdős, A. Rényi, \emph{On the strength of connectedness of a random graph}, Acta Mathematica Hungarica 12(1) (1961),  261--267.
        
    \end{thebibliography}

\end{document} 
