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Arpack

May 26, 2018

Argand Library: large eigenvalue subroutines (serial version)

ARPACK software is capable of solving large symmetric, nonsymmetric, and generalized eigenproblems. The software is designed to compute a few k eigenvalues with user-specified features, such as those of largest real part or largest magnitude. Storage requirements are on the order of n*k locations, and no auxiliary storage is required. A set of numerically orthogonal Schur basis vectors for the desired k-dimensional eigen-space is computed. Numerically accurate eigenvectors are available on request.

WWW http//www.caam.rice.edu/software/ARPACK/