Preconditioning highly indefinite and nonsymmetric matrices (Q2706440)
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scientific article
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Preconditioning highly indefinite and nonsymmetric matrices |
scientific article |
Statements
19 March 2001
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preconditioned iterative methods
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maximum transversal
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row and column scalings
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sparse approximate inverses
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algorithms
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numerical results
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performance
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Preconditioning highly indefinite and nonsymmetric matrices (English)
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The authors are concerned with a preprocessing step for preconditioned iterative schemes applied to highly indefinite, nonsymmetric linear systems. The goal is to achieve stable and cost effective preconditioners by appropriate permutation and scaling algorithms including the use of maximum product transversals. Extensive numerical results for a wide variety of test cases indicate improved reliability and performance of the approach.
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