Package Name LASO2
Author(s) David Scott
Version 2
Date August 1983
Language Fortran IV
Platform(s) those with FORTRAN
References 4.4 The Lanczos Method
7.9 Block Lanczos
Functionality This is a blocked Lanczos method package.

The LASO package is a set of FORTRAN IV subroutines for computing a few eigenvalues of a large (sparse) symmetric matrix.

DILASO Finds all the eigenvalues and eigenvectors of a large sparse symmetric matrix outside a user defined excluded interval.

DNLASO Finds a few eigenvalues and eigenvectors at either end of the spectrum of a large sparse symmetric matrix.

(For single precision versions request SILASO and SNLASO)

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