deletions | additions       diff --git a/Weird Ideas.tex b/Weird Ideas.tex  index 7fa1ea0..7f55704 100644  --- a/Weird Ideas.tex  +++ b/Weird Ideas.tex 
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Inverses, \begin{equation}  \nabla^{-1}=\frac{1}{3} \begin{bmatrix}   \partial_x^{-2}\partial_y^{-1}\partial_z^{-1} \partial_x^{-1}  & \partial_x^{-1}\partial_y^{-2}\partial_z^{-1} \partial_y^{-1}  & \partial_x^{-1}\partial_y^{-1}\partial_z^{-2} \partial_z^{-1}  & \end{bmatrix}  \end{equation}