next up previous contents index
Next: Band Lanczos Method   Up: Implicitly Restarted Lanczos Method Previous: Implementation of Locking and   Contents   Index

Software Availability

While we have presented the IRLM as much as possible in template form, we do not recommend implementation from this description for production purposes. High-quality software is freely available in ARPACK. This software is based upon the implicitly restarted Arnoldi method (IRAM) that is presented here in §7.6. When the matrix $A$ is symmetric (Hermitian) this reduces to the IRLM described in this section.

ARPACK provides various drivers in template form for direct application to $A$, SI, and for computing a partial SVD of a general rectangular matrix. For complete information, one should consult the ARPACK Users' Guide [295].

The thick restart variant of Wu and Simon [463] is implemented in the code TRLAN.

For more information about this software, including how to access it, see the book's homepage ETHOME.

Susan Blackford 2000-11-20