Copied The laplacian in polar coordinates is \begin{equation} \nabla ^2u=\frac {1}{r}\frac {\partial }{\partial r} \left (r\frac {\partial u}{\partial r}\right ) +\frac {1}{r^2}\frac {\partial ^2u}{\partial \theta ^2}. \tag {1} \end{equation} Raw LaTeX The laplacian in polar coordinates is \begin{equation} \nabla^2u=\frac{1}{r}\frac{\partial}{\partial r} \left(r\frac{\partial u}{\partial r}\right) +\frac{1}{r^2}\frac{\partial^2u}{\partial\theta^2}. \tag{1} \end{equation} Topic Tags Elliptic Equations Laplace Equation