报告内容
框架
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Using the equivalent block
two-by-two real linear systems and relaxing technique, we establish a new block
preconditioner for a class of complex symmetric indefinite linear systems. The
new preconditioner is much closer to the original block two-by-two coefficient
matrix than the Hermitian and Skew-Hermitian splitting (HSS) preconditioner. The
spectral properties of the preconditioned matrix are analyzed. The eigenvector
distribution of the preconditioned matrix is discussed and an upper bound for
the degree of the minimal polynomial of the preconditioned matrix is derived.
Finally, some numerical examples are provided to show the effectiveness and
robustness of our proposed preconditioner
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