Spectral Analysis for HSS Preconditioners

• 作 者: Lung Chak Chan Michael K. Ng N
• 机 构: DepartmentofMathematics,DepartmentofMathematics
• 出 处: 高等学校计算数学学报：英文版
• 发表日期: 2008年1期
• 关键词: 迭代方法 预处理 光谱分析 数学模拟 Saddle point problems iterative methods preconditioning ei
• 基金项目: Acknowledgments M. Ng＇s research is supported in part by Hong Kong Research Grants Council Grant Nos. 7035/04P and 7035/05P and HKBU FRGs.

<正>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 spec