slepc4py demos

• ex1.py: Standard symmetric eigenproblem for the 1-D Laplacian
• ex2.py: Standard symmetric eigenproblem for the 2-D Laplacian
• ex3.py: Matrix-free eigenproblem for the 2-D Laplacian
• ex4.py: Singular value decomposition of the Lauchli matrix
• ex5.py: Simple quadratic eigenvalue problem
• ex6.py: Compute exp(t*A)*v for a matrix from a Markov model
• ex7.py: Nonlinear eigenproblem with callback functions
• ex8.py: Nonlinear eigenproblem with split form
• ex9.py: Generalized symmetric-definite eigenproblem
• ex10.py: Laplace problem using the Proper Orthogonal Decomposition
• ex11.py: 2-D Laplacian eigenproblem solved with contour integral
• ex12.py: Illustrate the use of arbitrary selection
• ex13.py: Nonlinear eigenproblem with contour integral
• ex14.py: Lyapunov equation with the shifted 2-D Laplacian