PlanetPhysics/Laplacian in Cylindrical Coordinates

The [[../LaplaceOperator/|Laplacian]] [[../QuantumSpinNetworkFunctor2/|operator]] in cylindrical coordinates is

$\underset{cyl}{\overset{2}{\mathrm{\nabla }}}=\frac{1}{r}\frac{\partial }{\partial r}\left(r\frac{\partial }{\partial r}\right)+\frac{1}{r^2}\frac{{\partial }^2}{\partial {\theta }^2}+\frac{{\partial }^2}{\partial z^2}$