deletions | additions       diff --git a/header.tex b/header.tex  index f2d120f..0382d6f 100644  --- a/header.tex  +++ b/header.tex 
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\newcommand{\fosrfrom}{$\textsf{f}_{\textsf{OSRfrom}}$}  \newcommand{\fosrto}{$\textsf{f}\textsf{'}_{\textsf{OSRto}}$}  \newcommand{\fstub}{$\textsf{f}_{\textsf{stub}}$}  \newcommand{\osrpoint}{\textsf{L}}  % theorems  \newtheorem{theorem}{Theorem} 
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