--- a/preamble.tex	Mon Jun 02 22:32:54 2008 +0000
+++ b/preamble.tex	Sun Jun 08 21:34:46 2008 +0000
@@ -107,11 +107,10 @@
 \newcommand{\qMod}{\qRing-\operatorname{Mod}}
 \newcommand{\ZMod}{\Integer-\operatorname{Mod}}
 
-\newcommand{\To}{\rightarrow}
-\newcommand{\Into}{\hookrightarrow}
-\newcommand{\Onto}{\mapsto}
-\newcommand{\Iso}{\cong}
-\newcommand{\ActsOn}{\circlearrowright}
+\newcommand{\into}{\hookrightarrow}
+\newcommand{\onto}{\twoheadrightarrow}
+\newcommand{\iso}{\cong}
+\newcommand{\actsOn}{\circlearrowright}
 
 \newcommand{\htpy}{\simeq}