deletions | additions       diff --git a/INTRODUCTION.tex b/INTRODUCTION.tex  index 4126fdc..b82a05f 100644  --- a/INTRODUCTION.tex  +++ b/INTRODUCTION.tex 
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\label{eqn:test-equation}  \nabla_{\rm rad} = \frac{3F\kappa}{4acg}\frac{P}{T^4} > \nabla_{\rm ad}.  \end{equation}  \ref {eqn:test-equation}