deletions | additions       diff --git a/header.tex b/header.tex  index d4e5572..e03701e 100644  --- a/header.tex  +++ b/header.tex 
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\newcommand{\catme}{\href{http://www.catme.org}{CATME}}  \newcommand{\ipython}{\texttt{iPython}}  \newcommand{\np}{\texttt{numpy}}  \newcommand{\sp}{\texttt{scipy}}  \newcommand{\plt}{\texttt{matplotlib}}