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Preconditioning indefinite discretization matrices

โœ Scribed by Harry Yserentant


Publisher
Springer-Verlag
Year
1989
Tongue
English
Weight
520 KB
Volume
54
Category
Article
ISSN
0029-599X

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A two-phase preconditioning strategy of
โœ Eun-Joo Lee; Jun Zhang ๐Ÿ“‚ Article ๐Ÿ“… 2009 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 445 KB

A two-phase preconditioning strategy based on a factored sparse approximate inverse is proposed for solving sparse indefinite matrices. In each phase, the strategy first makes the original matrix diagonally dominant to enhance the stability by a shifting method, and constructs an inverse approximati