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%%
%% The LaTeX Graphics Companion, 2ed (first printing May 2007)
%%
%% Example 7-4-16 on page 489.
%%
%% 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{207.83385pt}
\StartShownPreambleCommands
\usepackage[all,dvips]{xy}
\newcommand\Neuron[1]{\POS*+=<1em>[o]+[F]{#1}}
\newcommand\Link[1]{\ar @{-} "#1"}
\newcommand\Out{\ar +/r8mm/}
\newcommand\In{\save +/l9mm/*{}\ar +/r5mm/\restore}
\newgraphescape{O}[1]{!{\Neuron{#1}="#1"\Out}}
\newgraphescape{H}[1]{!{\Neuron{#1}="#1"\Link{A}\Link{B}}}
\newgraphescape{I}[1]{!{\Neuron{#1}\In\Link{a}\Link{b}\Link{c}}}
\StopShownPreambleCommands
\begin{document}
\[\xygraph{!{0;<18mm,0mm>:<0mm,10mm>::}
[] !O{A} [d]!O{B}
[dd]*[left]!U[F]\txt<12mm>{output\\layer}="T"
"A" [u(.5)l]!H{a}
[d]!H{b} [d]!H{c}
"T" [l] *[left]!U[F]\txt<12mm>{hidden\\layer}
"a" [ul]!I{t_1} [d] !I{t_2} [d] !I{t_3}
[d] !I{t_4} [d] !I{t_5}
"T"[ll] *[left]!U[F]\txt<12mm>{input\\layer}
}\]
\end{document}
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