\pagestyle{empty}

% hyphenation penalty
\hyphenpenalty=80\relax 
\exhyphenpenalty=80\relax 
\sloppy

% paper size for A4

\hoffset = 0pt
\voffset = 0pt
\topmargin = 0pt
\headheight = 0pt
\headsep = 0pt
\oddsidemargin = 0pt
% \textheight = 634pt
\textheight = 690pt
\textwidth = 453pt
\paperheight = 845pt
\paperwidth = 597pt

% font size
\def\small{\@setfontsize{\small}{10}{12pt}}
\def\footnotesize{\@setfontsize{\footnotesize}{9}{10.5pt}}
\def\scriptsize{\@setfontsize{\scriptsize}{8}{9pt}}
\def\tiny{\@setfontsize{\tiny}{6}{7pt}}
\def\sublargesize{\@setfontsize{\sublargesize}{12}{14pt}}
\def\large{\@setfontsize{\large}{12}{14pt}}
\def\Large{\@setfontsize{\Large}{14}{17pt}}
\def\LARGE{\@setfontsize{\LARGE}{17}{20pt}}
\def\huge{\@setfontsize{\huge}{20}{24pt}}
\def\Huge{\@setfontsize{\Huge}{24}{28pt}}

%figure and table caption 
\def\figurename{Fig.}
\def\tablename{Table}

% interline spacing
\def\@normalsize{\@setsize\normalsize{10pt}\xpt\@xpt
\abovedisplayskip 10pt plus2pt minus5pt\belowdisplayskip \abovedisplayskip
\abovedisplayshortskip \z@ plus3pt\belowdisplayshortskip 6pt plus3pt
minus3pt\let\@listi\@listI}

%maketitle
\def\@maketitle{%
  \null
  \begin{center}
  \let \footnote \thanks
    \vskip -1mm
    {\Large \bf
      \@title
     \par}
    \vskip 6mm
    {
      \lineskip .5em%
      \begin{tabular}[t]{c}
        \@author
      \end{tabular}      \par}
  \end{center}
  \par
  \vskip 0.5em 
}


\usepackage{latexsym}
\usepackage{amsmath}
\usepackage{amssymb}

