\documentclass[12pt]{article}
\pagestyle{empty}
\usepackage{amsmath,amssymb,times,bm}

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\setlength{\topmargin}{0mm} \setlength{\headheight}{0mm}
\setlength{\headsep}{0mm} \setlength{\topmargin}{0mm}
\setlength{\oddsidemargin}{7mm} \setlength{\textwidth}{150mm}
\setlength{\textheight}{190mm} \setlength{\parindent}{25pt}
\setlength{\parskip}{3pt}

\begin{document}


\begin{center}
%%%%% TITLE %%%%%
\textbf{\large Title of your talk}

%%%%% AUTHORS %%%%%
\vskip 7mm \textbf{ Your Name }

%%%%% AFFILIATIONS %%%%%
\vskip 10mm
\emph{Dept./Inst. of Mathematics,\\
 University/Academic Center\\
 street address, zip, city\\
 country \\
 \vskip 3mm
 your email}

\end{center}

%%%%% MAIN TEXT %%%%%

\noindent \textbf{Abstract}:

main text




\end{document} 