deletions | additions       diff --git a/Sketchy Generation.tex b/Sketchy Generation.tex  index 77415e0..249f30d 100644  --- a/Sketchy Generation.tex  +++ b/Sketchy Generation.tex 
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\partial_x\partial_z & \partial_y\partial_z & -\partial_y^2-\partial_x^2   \end{bmatrix}  \end{equation}  However this should be equal to $\nabla(\nabla\cdot \mathbf{A}) - \nabla^2\mathbf{A}$ via an identity.  We can tell that \begin{equation}  \nabla^2=  \begin{bmatrix}  \partial_x^2 + \partial_y^2 + \partial_z^2 & 0 & 0 \\  0 & \partial_x^2 + \partial_y^2 + \partial_z^2 & 0 \\  0 & 0 & \partial_x^2 + \partial_y^2 + \partial_z^2  \end{bmatrix}  \end{equation}