摘要
In this paper,we are interested in HSS preconditioners for saddle point lin- ear systems with a nonzero(2,2)-th block.We study an approximation of the spectra of HSS preconditioned matrices and use these results to illustrate and explain the spectra obtained from numerical examples,where the previous spectral analysis of HSS precon- ditioned matrices does not cover.
In this paper, we are interested in HSS preconditioners for saddle point linear systems with a nonzero （2, 2）-th block. We study an approximation of the spectra of HSS preconditioned matrices and use these results to illustrate and explain the spectra obtained from numerical examples, where the previous spectral analysis of HSS preconditioned matrices does not cover.
关键词
迭代方法
预处理
光谱分析
数学模拟
Saddle point problems, iterative methods, preconditioning, eigenvalues
