Two block triangular preconditioners for asymmetric saddle point problems

Cui-Xia Li and Shi-Liang Wu

Applied Mathematics and Computation, 2015, vol. 269, issue C, 456-463

Abstract: In this paper, two block triangular preconditioners for the asymmetric saddle point problems with singular (1,1) block are presented. The spectral characteristics of the preconditioned matrices are discussed in detail. Theoretical analysis shows that all the eigenvalues of the preconditioned matrices are strongly clustered. Numerical experiments are reported to the efficiency of the proposed preconditioners.

Keywords: Block triangular preconditioner; Saddle point problems; Nullity; Augmentation; Krylov subspace method (search for similar items in EconPapers)
Date: 2015
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Persistent link: https://EconPapers.repec.org/RePEc:eee:apmaco:v:269:y:2015:i:c:p:456-463

DOI: 10.1016/j.amc.2015.07.093

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