diff -r 8479b7be0fcc -r f844cffa5c03 preamble.tex
--- a/preamble.tex	Thu Jul 03 00:08:33 2008 +0000
+++ b/preamble.tex	Thu Jul 03 00:08:58 2008 +0000
@@ -118,6 +118,7 @@
 \newcommand{\iso}{\cong}
 \newcommand{\actsOn}{\circlearrowright}
 \newcommand{\isoto}{\xrightarrow{\iso}}
+\newcommand{\quismto}{\xrightarrow[\text{q.i.}]{\iso}}
 
 \newcommand{\htpy}{\simeq}