deletions | additions       diff --git a/header.tex b/header.tex  index 27a0a26..3a6b18f 100644  --- a/header.tex  +++ b/header.tex 
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\newcommand{\adrad}{\nabla_{\mathrm{\!rad}}}  \newcommand{\adgrad}{\nabla_{\mathrm{\!ad}}}  \newcommand{\mugrad}{\nabla_{\!\mu}}  \newcommand{\cp}{c_{\P}} \newcommand{\cp}{c_{\mathrm{P}}}  \newcommand{\hp}{H_{\mathrm{P}}}  % macros for naming codes, plus shortcuts for some common ones  %\newcommand{\code}[1]{\texttt{#1}}