doc-src/Logics/CTT.tex

--- a/doc-src/Logics/CTT.tex	Mon May 30 13:58:00 2011 +0200
+++ b/doc-src/Logics/CTT.tex	Mon May 30 15:30:05 2011 +0100
@@ -644,10 +644,14 @@
 \begin{figure} 
 \index{#+@{\tt\#+} symbol}
 \index{*"- symbol}
-\index{"|"-@{{\tt"|"-"|} symbol}}
 \index{#*@{\tt\#*} symbol}
 \index{*div symbol}
 \index{*mod symbol}
+
+\index{absolute difference}
+\index{"!-"!@{\tt\char124-\char124} symbol}
+%\char124 is vertical bar. We use ! because | stopped working
+
 \begin{constants}
   \it symbol  & \it meta-type & \it priority & \it description \\ 
   \tt \#*       & $[i,i]\To i$  &  Left 70      & multiplication \\