deletions | additions       diff --git a/intro.tex b/intro.tex  index 041bcb1..381528f 100644  --- a/intro.tex  +++ b/intro.tex 
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\newcommand{\feval}[1]{{\mbox{\tt feval}}} \newcommand{\feval}[1]{{\mbox{{\tt feval}}}}  \section{Introduction}  \label{se:intro} 
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