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Approximate sparsity patterns for the inverse of a matrix and preconditioning

โœ Scribed by Thomas Huckle


Book ID
108415948
Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
246 KB
Volume
30
Category
Article
ISSN
0168-9274

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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