Package Name | LANZ |
Author(s)
| Mark T. Jones and Merrell L. Patrick
|
Version | 1.0 |
Date | 1991
|
Language | C, Fortran |
Platform(s) | sun3, sun4, cray ymp, convex 220, Encore Multimax
possibly others |
Reference(s)
|
4.4
Lanczos Method, Hermitian eigenvalue problem
5.5
Lanczos Method, generalized Hermitian eigenvalue problem
|
Functionality
|
LANZ solves the symmetric generalized eigenproblem,
K x = lambda M x
where K is symmetric positive definite and M is
positive semi-definite. It is also capable of solving
K x = - lambda M x
where M can be indefinite. It can find either 1) all
the eigenpairs in a user-specified range, or 2) the p eigenpairs
closest to some user-specified value, sigma. This algorithm has
spectral transformation, partial reorthogonalization, and accelerated
convergence.
|
Location
|
http://www.netlib.org/lanz/index.html
|