
\documentclass[11pt]{article}
\usepackage{amsmath,amssymb,amstext,dsfont,fancyvrb,float,fontenc,graphicx,subfigure, theorem}

 
%%% FILL THE TITLE AND THE FULL NAMES OF THE AUTHORS
\title{\Large\bf Title of the paper}
  \vskip 1.5em
\author{\sc Author One and Author Two}
\date{}

%%%% MACROS AND DEFINITIONS 
\setcounter{tocdepth}{0} \addtolength{\oddsidemargin}{6mm}
\addtolength{\evensidemargin}{-12mm} \addtolength{\voffset}{-6mm}
\addtolength{\textheight}{18mm}
\addtolength{\headsep}{-3pt}
\cleardoublepage \pagestyle{myheadings}
\usepackage[strict]{changepage}
\def\abstractname{Abstract -}   % <-----------------
\def\abstract{\begin{adjustwidth}{1cm}{1cm} \par    \footnotesize \noindent {\bf \abstractname} 
\def\endabstract{ \end{adjustwidth} \smallskip }}
\def\keywordsname{Key words and phrases~:} %<------------------
\def\keywords{\begin{adjustwidth}{1cm}{1cm} \par\footnotesize \noindent{\bf \keywordsname}
\def\endkeywords{ \end{adjustwidth} \smallskip}}
\def\MSCname{Mathematics Subject Classification {\rm(2000)}~:} % <-----------------
\def\MSC{ \begin{adjustwidth}{1cm}{1cm} \par\footnotesize\noindent{\bf \MSCname\/}
\def\endMSC{ \end{adjustwidth}  }}

%%%%% COMMANDS FOR THEOREMS
{\theorembodyfont{\itshape}\newtheorem{theorem}{Theorem}[section]}
{\theorembodyfont{\itshape}\newtheorem{proposition}{Proposition}[section]}
{\theorembodyfont{\itshape}\newtheorem{definition}{Definition}[section]}
{\theorembodyfont{\itshape}\newtheorem{lemma}{Lemma}[section]}
{\theorembodyfont{\itshape}\newtheorem{corollary}{Corollary}[section]}
{\theorembodyfont{\rm}\newtheorem{notation}{Notation}[section]}
{\theorembodyfont{\rm}\newtheorem{remark}{Remark}[section]}
{\theorembodyfont{\rm}\newtheorem{hypothesis}{Hypothesis}[section]}
{\theorembodyfont{\rm }\newtheorem{example}{Example}[section]}
\def\proof{{\noindent \bf Proof.~}}
\def\endproof{\hspace{\fill}{\boldmath $\Box$}\par}
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \begin{document}
\maketitle
\vskip 1.5em
 \begin{abstract}
 Type your abstract here.
 \end{abstract}
 
\begin{keywords}
Type here the key words, separated by comma.
\end{keywords}

\begin{MSC}
  MSC (2000) codes.
\end{MSC}


\section{Title of first section} 

Please use throughout the paper the commands listed above for definitions, theorems, etc.

\begin{definition} 
This is a definition. 
\end{definition}

 \begin{theorem}\label{theorem1}
 The first theorem.
 \end{theorem}
 
 \begin{proof}
 This is the proof of Theorem \ref{theorem1}
 \end{proof}
 
 \section*{Acknowledgments} Please write at the end of the paper the acknowledgements.
 {\footnotesize
 
 \begin{thebibliography}{00}
 % REFERENCE FOR JOURNALS 
 \bibitem{one} Authors, Title, {\it Journal (abbreviated title)}, {\bf vol} (year), pages.
 \bibitem{two} Other Authors, {\it Title}, Publishing House, year.
 \end{thebibliography} }
 
 %%%%%%%% AUTHORS

 { \footnotesize  
\medskip
\medskip
 \vspace*{1mm} 
 
\noindent {\it Author One}\\  
Institution \\
Post address \\
E-mail: {\tt authorone@institution}\\ \\  

\noindent {\it Author Two}\\  
Institution \\
Post address \\
E-mail: {\tt authortwo@institution} }   

  
 
 \end{document}

  




