Block preconditioners for complex symmetric linear system with two-by-two block form (Q1666151)
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scientific article; zbMATH DE number 6926812
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| English | Block preconditioners for complex symmetric linear system with two-by-two block form |
scientific article; zbMATH DE number 6926812 |
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Block preconditioners for complex symmetric linear system with two-by-two block form (English)
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27 August 2018
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Summary: Based on the previous work by \textit{G.-F. Zhang} and \textit{Z. Zheng} [Japan J. Ind. Appl. Math. 31, No. 2, 265--278 (2014; Zbl 1307.65038)], three block preconditioners for complex symmetric linear system with two-by-two block form are presented. Spectral properties of the preconditioned matrices are discussed in detail. It is shown that all the eigenvalues of the preconditioned matrices are well-clustered. Numerical experiments are reported to illustrate the efficiency of the proposed preconditioners.
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