--- a/document/isabelle.sty	Sun Jun 23 03:55:49 2013 +0100
+++ b/document/isabelle.sty	Fri Sep 06 12:55:12 2013 +0100
@@ -30,8 +30,6 @@
 \DeclareRobustCommand{\isascriptstyle}{\def\isamath##1{##1}\def\isatext##1{\mbox{\isaspacing\isastylescript##1}}}
 \newcommand{\isactrlsub}[1]{\emph{\isascriptstyle${}\sb{#1}$}}
 \newcommand{\isactrlsup}[1]{\emph{\isascriptstyle${}\sp{#1}$}}
-\newcommand{\isactrlisub}[1]{\emph{\isascriptstyle${}\sb{#1}$}}
-\newcommand{\isactrlisup}[1]{\emph{\isascriptstyle${}\sp{#1}$}}
 \DeclareRobustCommand{\isactrlbsub}{\emph\bgroup\math{}\sb\bgroup\mbox\bgroup\isaspacing\isastylescript}
 \DeclareRobustCommand{\isactrlesub}{\egroup\egroup\endmath\egroup}
 \DeclareRobustCommand{\isactrlbsup}{\emph\bgroup\math{}\sp\bgroup\mbox\bgroup\isaspacing\isastylescript}
@@ -39,8 +37,6 @@
 \newcommand{\isactrlbold}[1]{{\bfseries\upshape\boldmath#1}}
 
 \newenvironment{isaantiq}{{\isacharat\isacharbraceleft}}{{\isacharbraceright}}
-\newcommand{\isaantiqopen}{\isakeyword{\isacharbraceleft}}
-\newcommand{\isaantiqclose}{\isakeyword{\isacharbraceright}}
 
 \newdimen\isa@parindent\newdimen\isa@parskip