### Tuesday, July 15

10:30 AM-12:30 PM

*Law School, Room 290*

## MS19

Solving Large-Scale Nonsymmetric Eigenvalue Problems

Many important applications in chemistry, physics, and engineering lead to large, sparse nonsymmetric algebraic eigenvalue problems. These problems are a major challenge, with a number of competing methods available. Much progress has been made in recent years on theoretical and practical aspects of methods such as the Arnoldi and nonsymmetric Lanczos procedures, subspace iteration, and rational Krylov methods. The development of parallel methods for solving the nonsymmetric algebraic eigenvalue problem is still a major challenge. The speakers will describe how large-scale nonsymmetric eigenvalue problems arise in applications, discuss current methods of solution and their degree of success, explain some recent results and algorithmic developments, and summarize the software scene, including the development of templates.

**Organizer: Nicholas J. Higham**

*University of Manchester, United Kingdom*

**10:30 The Numerical Solution of the Large-Scale Eigenvalue Problem with Orthogonal Projection Methods**
- Richard B. Lehoucq, Argonne National Laboratory
**11:00 Challenging Large-Scale Non-Hermitian Eigenvalue Problems Arising in Applications**
- Zhaojun Bai, University of Kentucky

Speaker replaced by: David Day, Sandia National Laboratories
**11:30 The Matrix Sign Function for Large Sparse Matrices**
*Ralph Byers* and Chunyang He, University of Kansas
**12:00 Templates for Eigenvalue Problems**
- James W. Demmel, University of California, Berkeley

AN97 Homepage | Program Updates|

Registration | Hotel and Dormitory Information | Transportation | Program-at-a-Glance | Program Overview

*MMD, 5/7/97*

*tjf, 5/28/97*

*MMD, 6/27/97*