diff -r 18b742b1b308 -r b98790f0282e sandbox.tex
--- a/sandbox.tex	Wed Jul 28 12:53:16 2010 -0700
+++ b/sandbox.tex	Wed Jul 28 13:39:52 2010 -0700
@@ -12,5 +12,68 @@
 
 \begin{document}
 
+\begin{equation*}
+\mathfig{.73}{tempkw/zo2}
+\end{equation*}
 
+\begin{tikzpicture}
+\newcommand{\rr}{6}
+\newcommand{\vertex}{node[circle,fill=black,inner sep=1pt] {}}
+
+\node(A) at (0,0) {
+\begin{tikzpicture}
+\node[red,left] at (0,0)  {$y$};
+\draw (0,0) \vertex arc (-120:-105:\rr) node[red,below] {$a$} arc(-105:-90:\rr) \vertex node[red,below](x2) {$x$};
+\draw (0,0) \vertex arc (120:105:\rr) node[red,above] {$a$} arc (105:90:\rr) \vertex node[red,above](x1) {$x$} -- (x2);
+\begin{scope}
+	\path[clip] (0,0) arc (-120:-60:\rr) arc (60:120:\rr);
+	\foreach \x in {0,0.24,...,3} {
+		\draw[green!50!brown] (\x,1) -- (\x,-1);
+	}
+\end{scope}
+\draw[red, decorate,decoration={brace,amplitude=5pt}] ($(x1)+(0.2,-0.2)$) -- ($(x2)+(0.2,0.2)$) node[midway, xshift=0.7cm] {$x \times I$};
+\end{tikzpicture}
+};
+
+\node(B) at (-4,-4) {
+\begin{tikzpicture}
+\node[red,left] at (0,0) {$y$};
+\draw (0,0) \vertex 
+	arc (120:105:\rr) node[red,above] {$a$}
+	arc (105:90:\rr) node[red,above] {$x$} \vertex
+	arc (90:75:\rr) node[red,above] {$x \times I$}
+	arc (75:60:\rr) \vertex node[red,right] {$x$}
+	arc (-60:-90:\rr) node[red,below] {$a$}
+	arc (-90:-120:\rr);
+\begin{scope}
+	\path[clip] (0,0) arc (-120:-60:\rr) arc (60:120:\rr);
+	\foreach \x in {0,0.48,...,9} {
+		\draw[green!50!brown] (\x/4,1) -- (\x,-1);
+	}
+\end{scope}
+\end{tikzpicture}
+};
+
+\node(C) at (4,-4) {
+\begin{tikzpicture}[y=-1cm]
+\node[red,left] at (0,0) {$y$};
+\draw (0,0) \vertex 
+	arc (120:105:\rr) node[red,below] {$a$}
+	arc (105:90:\rr) node[red,below] {$x$} \vertex
+	arc (90:75:\rr) node[red,below] {$x \times I$}
+	arc (75:60:\rr) \vertex node[red,right] {$x$}
+	arc (-60:-90:\rr) node[red,above] {$a$}
+	arc (-90:-120:\rr);
+\begin{scope}
+	\path[clip] (0,0) arc (-120:-60:\rr) arc (60:120:\rr);
+	\foreach \x in {0,0.48,...,9} {
+		\draw[green!50!brown] (\x/4,1) -- (\x,-1);
+	}
+\end{scope}
+\end{tikzpicture}
+};
+
+\draw[->] (A) -- (B);
+\draw[->] (A) -- (C);
+\end{tikzpicture}
 \end{document}