\setlength{\textwidth}{17.4cm}
\setlength{\oddsidemargin}{-0.85cm}
\setlength{\textheight}{24.5cm}
\setlength{\topmargin}{-1.35cm}
\setlength{\columnsep}{0.8cm}

\long\def\@makecaption#1#2{%
  \vskip\abovecaptionskip
  \sbox\@tempboxa{#1. #2}%
  \ifdim \wd\@tempboxa >\hsize
    #1. #2\par
  \else
    \global \@minipagefalse
    \hb@xt@\hsize{\hfil\box\@tempboxa\hfil}%
  \fi
  \vskip\belowcaptionskip}

\def\@begintheorem#1#2{\trivlist 
   \item[\hskip \labelsep{\bfseries #1\ #2.}]\itshape}
\def\@opargbegintheorem#1#2#3{\trivlist
      \item[\hskip \labelsep{\bfseries #1\ #2\ (#3).}]\itshape}
\def\@endtheorem{\endtrivlist}

\def\@seccntformat#1{\csname the#1\endcsname.\ \ }
