On the computation of approximate eigenvalues and eigenfunctions of elliptic operators by means of a multi-grid method. (English) Zbl 0403.65043
MSC:
65N25 | Numerical methods for eigenvalue problems for boundary value problems involving PDEs |
35J20 | Variational methods for second-order elliptic equations |
35P15 | Estimates of eigenvalues in context of PDEs |
35P25 | Scattering theory for PDEs |
65N30 | Finite element, Rayleigh-Ritz and Galerkin methods for boundary value problems involving PDEs |