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%%
%% The LaTeX Graphics Companion, 2ed (first printing May 2007)
%%
%% Example 7-4-29 on page 499.
%%
%% Copyright (C) 2007 Michel Goossens, Frank Mittelbach, Denis Roegel, Sebastian Rahtz, Herbert Vo\ss
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3
%% of this license or (at your option) any later version.
%%
%% See http://www.latex-project.org/lppl.txt for details.
%%
\documentclass{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{183.83385pt}
\StartShownPreambleCommands
\usepackage[all,poly]{xy}
\StopShownPreambleCommands
\begin{document}
\[\begin{xy} /r10mm/:,
{\xypolygon4"F"{\dir{*}}}
,+(.8,1.0),{\xypolygon4"B"{\dir{*}}}
,"F1";"B1"**@{-},"F2";"B2"**@{-}
,"F3";"B3"**@{-},"F4";"B4"**@{-}
,-(1.0,2.8)
,{\xypolygon10"O"{~={18}\dir{*}}}
,{\xypolygon5"I"{~:{(0.55,0):}
~={18}{\dir{*}}}}
,"O1";"I1"**@{.},"O3";"I2"**@{.}
,"O5";"I3"**@{.},"O7";"I4"**@{.}
,"O9";"I5"**@{.}
\end{xy}\]
\end{document}
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