pytenet.krylov

Krylov subspace algorithms.

Functions

arnoldi_iteration(afunc, vstart, numiter)	Perform a "matrix free" Arnoldi iteration.
eigh_krylov(afunc, vstart, numiter, numeig)	Compute Krylov subspace approximation of eigenvalues and vectors.
eigh_tridiag(d, e)	Solve the eigenvalue problem for a real symmetric tridiagonal matrix.
expm_krylov(afunc, vec, dt, numiter[, hermitian])	Compute Krylov subspace approximation of the matrix exponential applied to input vector: expm(dt*A)*vec.
lanczos_iteration(afunc, vstart, numiter)	Perform a "matrix free" Lanczos iteration.