diff -r c570a7a75b07 -r ab0b4827c89c text/intro.tex
--- a/text/intro.tex	Thu Aug 11 22:14:11 2011 -0600
+++ b/text/intro.tex	Fri Aug 12 10:00:59 2011 -0600
@@ -260,8 +260,7 @@
 Note that this includes the case of gluing two disjoint manifolds together.
 \begin{property}[Gluing map]
 \label{property:gluing-map}%
-Given a gluing $X \to X_\mathrm{gl}$, there is
-a natural map
+Given a gluing $X \to X_\mathrm{gl}$, there is an injective natural map
 \[
 	\bc_*(X) \to \bc_*(X_\mathrm{gl}) 
 \]