<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">\documentclass{ppex}
\nonstopmode
\usepackage [curve]{xy}
\pagestyle{empty}
\setlength\textwidth{183.0pt}
\begin{document}
\ResetPreambleCommands
\ReadyForTheFray
\usepackage [curve]{xy}
\[\begin{xy}
  0*+{L};(50,20)*+{R}
  **\crv{~*=&lt;2mm&gt;{.}(20,30)&amp;(30,35)}
  **\crv~Lc{~**@{==}~*{\bullet}%
       (20,-15)&amp;(30,-15)}
\end{xy}\]

\end{document}
</pre></body></html>