deletions | additions       diff --git a/Gradients.tex b/Gradients.tex  index 5e23cfa..ed1918d 100644  --- a/Gradients.tex  +++ b/Gradients.tex 
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F = F_{c} + F_{r} \equiv \frac{4ac}{3}\frac{T^4}{\kappa \rho}\frac{\nabla_r}{\hp}.  \end{equation}  In a stellar convection zone where no energy is produced by nuclear reactions, the following hierarchy holds: $\nabla_r > \nabla > \nabla' > \gradad$ \adgrad$