\if@twocolumn \textwidth175mm \marginparsep2.5mm \oddsidemargin-7.9mm \evensidemargin-7.9mm \else \ifcase \@ptsize\relax \textwidth146mm \oddsidemargin7.1mm \evensidemargin7.1mm \or \textwidth154mm \oddsidemargin2.6mm \evensidemargin2.6mm \or \textwidth164mm \oddsidemargin-2.4mm \evensidemargin-2.4mm \fi \marginparsep4mm \fi \ifcase \@ptsize\relax \textheight 59\baselineskip \or \textheight 52\baselineskip \or \textheight 49\baselineskip \fi \addtolength{\textheight}{\topskip} \topmargin-15mm