--- a/text/kw_macros.tex	Tue Jul 28 15:33:33 2009 +0000
+++ b/text/kw_macros.tex	Tue Jul 28 18:52:39 2009 +0000
@@ -22,6 +22,7 @@
 \def\pd#1#2{\frac{\partial #1}{\partial #2}}
 \def\lf{\overline{\cC}}
 \def\ot{\otimes}
+\def\inv{^{-1}}
 
 %\def\nn#1{{{\it \small [#1]}}}
 \def\nn#1{{{\color[rgb]{.2,.5,.6} \small [#1]}}}