I am trying to use python to solve a neutron diffusion equation. I know the analitical solution. I have a problem in writing the equation in python language.
I dont know how to add a Laplacian to the equation.This is the equation i should write in python. enter image description here. This is what I have now, i should add a Laplacian here.enter image description here. Belwo is my code: enter image description here
