--- a/text/comparing_defs.tex	Fri Oct 16 23:45:27 2009 +0000
+++ b/text/comparing_defs.tex	Sun Oct 18 23:54:43 2009 +0000
@@ -97,6 +97,8 @@
 Each approach has advantages and disadvantages.
 For better or worse, we choose bigons here.}
 
+\nn{maybe we should do both rectangles and bigons?}
+
 Define the $k$-morphisms $C^k$ of $C$ to be $\cC(B^k)_E$, where $B^k$ denotes the standard
 $k$-ball, which we also think of as the standard bihedron.
 Since we are thinking of $B^k$ as a bihedron, we have a standard decomposition of the $\bd B^k$