**lap5pt.py**: Python code for the 5-point Laplacian on a square**lap5ptconv.py**: Convergence study for the 5-point Laplacian**sddemo1.py**: Geometric demonstration of the problem with steepest descents**iterative_demo1.py**: Demonstration of the convergence of various iterative methods**bigmat.p**: a large and somewhat nasty finite element matrix, previously computed, which is imported by iterative_demo**gs5pt.py**: Gauss-Seidel iteration for the 5-point Laplacian**gs5ptdemo.py**: Graphical demo of convergence of Gauss-Seidel for the 5-point Laplacian**mg5pt.py**: Multigrid iteration for the 5-point Laplacian**mg5ptdemo.py**: Graphical demo of convergence of multigrid for the 5-point Laplacian**mg5ptdemo2.py**: Compare errors in multigrid and CG preconditioned by multigrid**firstprog.py**: A first program in FEniCS**poisson_convergence1.py**: Convergence study for finite elements**poisson_convergence2.py**: Convergence study for finite elements w/o requiring exact solution

Updated October 27, 2017