\documentclass[12pt]{article}   % you have 10pt, 11pt, or 12pt options

\setlength{\textwidth}{17.2cm}     % if you change this, consider changing
\setlength{\evensidemargin}{-.3cm} % side margins to retain centering
\setlength{\oddsidemargin}{-.3cm}

\setlength{\textheight}{24cm}   % if you change this, consider changing
\setlength{\topmargin}{-2.5cm}  % top margin to retain centering
\setlength{\headsep}{1.6cm}

%---------------------- These packages below add functionality to your version of LaTeX --------------
%---------------------- You might not use all of them --------------------------------------
\usepackage{amssymb, latexsym,amsthm,enumerate,epsfig,graphicx,color,float,subfigure,amsmath, makeidx, fancyhdr, lastpage,url}
\pagestyle{fancy}
\pagestyle{empty}


%------------------------- Theorem and Proof Environments --------------------------------

% This section defines all the environments you might use.  Just type
% \begin{theorem, or corollary, or whatever}, then the optional name of the
% theorem inside {} (or empty {} if no name), then body of the theorem,
% corollary, whatever, also inside {} then \end{theorem, corollary, whatever}
%
% Notice when I use them in the paper, I put an optional "argument" to the function
% and this gives a name to the theorem

\newenvironment{theorem}[1]{\vspace{.9cm}\noindent    {\bf Theorem {#1}}}{\vspace{.1cm}}
\newenvironment{lemma}[1]{\vspace{.9cm}\noindent    {\bf Lemma {#1}}}{\vspace{.1cm}}
\newenvironment{corollary}[1]{\vspace{.9cm}\noindent    {\bf Corollary {#1}}}{\vspace{.1cm}}
\newenvironment{definition}{\vspace{.9cm}\noindent {\bf Definition}}{\vspace{.1cm}}


% Keywords command
\providecommand{\keywords}[1]{\small\textbf{\textit{Keywords---}} #1  }

%*****************************************************************************************

\begin{document}  % necessary part of document

\title{ Your talk title }

\author{Author A* \\
        \small{ Author A's Department, Your University }\\
        \small{ E-mail: Author A's E-mail address }\\
        Author B\\
        \small{ Author B's Department, Your University }\\
        \small{ E-mail: Author B's E-mail address }
        }

\date{\empty} %No Date

\maketitle

\thispagestyle{empty}

\begin{abstract}
This is a template of the abstract for the 8th AQFC. \\
The file should be named such as
{\bf [Name of the Author]\textunderscore Abstract}.


 \vspace*{1cm}

\end{abstract}

\keywords{   keyword 1, keyword 2,  }

%------------------------------------------------------------------------------------
\begin{thebibliography}{99}  % 99 is the highest number of references this expects;
                                                       % this sets the expected width of the citation
\bibitem{ }
Authors, Title,
\emph{ Journal }, year, pp. pages,

\bibitem{ }
Authors,
\emph{The book's title}, Pubisher, year.
\end{thebibliography}

\end{document}

