On the eigenvalues and eigenvectors of block triangular preconditioned block matrices (Q2923356)
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scientific article; zbMATH DE number 6356183
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | On the eigenvalues and eigenvectors of block triangular preconditioned block matrices |
scientific article; zbMATH DE number 6356183 |
Statements
15 October 2014
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block triangular preconditioner
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convergence
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eigenvalues
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eigenvectors
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iterative method
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saddle point system
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On the eigenvalues and eigenvectors of block triangular preconditioned block matrices (English)
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The author considers the idea of preconditioning \(2 \times 2\) block matrices with block upper or lower triangular ones. She shows that a block lower triangular preconditioner gives the same spectrum as a block upper triangular one, and that the eigenvectors of the two preconditioned matrices are related.
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