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Circulant and skew-circulant preconditioners for skew-hermitian type Toeplitz systems

โœ Scribed by Raymond H. Chan; Xiao-Qing Jin

Publisher
Springer Netherlands
Year
1991
Tongue
English
Weight
690 KB
Volume
31
Category
Article
ISSN
0006-3835

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๐Ÿ“œ SIMILAR VOLUMES

Preconditioners for non-Hermitian Toepli
Preconditioners for non-Hermitian Toeplitz systems
โœ Raymond H. Chan; Daniel Potts; Gabriele Steidl ๐Ÿ“‚ Article ๐Ÿ“… 2001 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 131 KB

In this paper, we construct new !-circulant preconditioners for non-Hermitian Toeplitz systems, where we allow the generating function of the sequence of Toeplitz matrices to have zeros on the unit circle. We prove that the eigenvalues of the preconditioned normal equation are clustered at 1 and tha