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On the conditioning analysis of block approximate factorization methods

par Notay, Yvan
Référence Linear algebra and its applications, 154-156, 583-599
Publication Publié, 1991

Article révisé par les pairs

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Résumé :

The paper is devoted to the conditioning analysis of modified block incomplete factorizations of a given Stieltjes matrix. We obtain new results, improve other theories, and compare all existing upper bounds through numerical experiments. Applied to discrete elliptic PDEs, our results show that an O(h-1) spectral bound can be achieved for a large class of problems. © 1991.