Hello, It's my first topic here. :) In order to solve a PDE numerically, I have reached in a nonlinear system of algebraic equations. Does anyone here know a good method to solve it numerically? It seems like this: xij (t+dt) is proportional to xi,j+1(t), xij2(t), xi,j-12(t), xi-1,j(t), xi+1,j(t), etc.. where i and j are 'coordinates' of a 2D grid. Thank you so much in advance. Best regards, César.