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\documentclass{ppex}
\nonstopmode
\usepackage [curve,knot,arrow,dvips]{xy}
\pagestyle{empty}
\setlength\textwidth{183.0pt}
\begin{document}
\ResetPreambleCommands
\ReadyForTheFray
\usepackage [curve,knot,arrow,dvips]{xy}
\[\renewcommand{\labelstyle}{\scriptstyle}
\begin{xy} 0;/r8mm/:
,{\xcapv-|{a}}
, +(0,1) ,{\xcaph|{b}\xunderh|{c}%
\xcaph|{d}\xcapv|{e}}
,-(3,0),{\xoverh|{f}}
,+(1,0),{\xoverh|{g}}
,-(3,1),{\xcapv-|{h}\xcaph-|{i}}
,+(0,1),{\xunderh-|{j}}
,+(0,-1),{\xcaph-|{k}}
,+(0,1),{\xcapv|{l}}
\end{xy}\]
\end{document}
|
