We use multigrid to solve a 2D Poisson Equation.
So this 2D solver is to demonstrate the convergence properties guarenteed by theory on a 'model' problem.
Start with testMulti.m for more information
Important notes:
-Although in two dimensions, MATLAB's backslash linear systems solver is superior in most cases, multigrid wins out once we consider problems in three dimensions.
-Mesh generation is achieved using delaunay triangulation function on MATLAB, but pmesh.m performs additional element quality checks to ensure no pathological 'slivers' appear.