deletions | additions       diff --git a/When_using_spherical.tex b/When_using_spherical.tex  index 7da9ea7..756ac0f 100644  --- a/When_using_spherical.tex  +++ b/When_using_spherical.tex 
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When using spherical polar coordinates, in general $R$ will denote the standard ``areal'' radial coordinate; when dealing with a conformally flat solution, I'll use $r$ to denote the radial coordinate, as then it will \emph{not} be areal. Additionally, I often use the letter $q$ to denote the cylindrical polar quantity $\sqrt{x^2 + y^2} = r \, this purpose, but I've found $\rho$ to be used for too many other purposes.