On constraint preconditioners for generalized saddle point matrices |
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Authors: | Guo-Feng Zhang Jing-Yu Zhao |
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Affiliation: | School of Mathematics and Statistics, Lanzhou University, Lanzhou 730000, PR China |
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Abstract: | For the iterative solution of large sparse generalized saddle point problems, a class of new constraint preconditioners is presented, and the spectral properties and parameter choices are discussed. Numerical experiments are used to demonstrate the feasibility and effectiveness of the new preconditioners, as well as their advantages over the modified product-type skew-Hermitian triangular splitting (MPSTS) preconditioners. |
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Keywords: | Saddle point problems Iterative methods Preconditioning Nonsymmetric indefinite linear systems Navier-Stokes equations |
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