**lap5pt**: ipynb, py, html Python code for the 5-point Laplacian on a square**lap5ptconv**: ipynb, py, html Convergence study for the 5-point Laplacian**sddemo1**: py: Geometric demonstration of the problem with steepest descents**iterative_demo1**: ipynb, py, html Demonstration of the convergence of steepest descents and conjugate gradients**bigmat.p**: bigmat.p a large and somewhat nasty finite element matrix, previously computed, which is imported by iterative_demo1**pcg_demo1**: ipynb, py, html Demonstration of the convergence of steepest descents, conjugate gradients, and preconditioned conjugate gradient**gs5ptdemo**: ipynb, py, html Graphical demonstration of convergence of Gauss-Seidel for the 5-point Laplacian**mg5ptdemo**: ipynb, py, html Graphical demonstration of convergence of multigrid for the 5-point Laplacian**mg5ptdemo2**: ipynb, py, html Compare errors in multigrid and CG preconditioned by multigrid

Updated October 13, 2014