Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9511518 | Applied Numerical Mathematics | 2005 | 15 Pages |
Abstract
Block-GMRES is an iterative method for solving nonsymmetric systems of linear equations with multiple right-hand sides. Restarting may be needed, due to orthogonalization expense or limited storage. We discuss how restarting affects convergence and the role small eigenvalues play. Then a version of restarted block-GMRES that deflates eigenvalues is presented. It is demonstrated that deflation can be particularly important for block methods.
Related Topics
Physical Sciences and Engineering
Mathematics
Computational Mathematics
Authors
Ronald B. Morgan,