摘要
对于(1,1)块为正定的鞍点问题,本文给出了半增广松弛分裂预条件子.文中分析了预条件矩阵特征值分布情况,并用数值实验验证了半增广松弛分裂预条件子的有效性.
A relaxed splitting preconditioner base on incomplete augmentation is presented for the saddle point problems with positive definite (1, 1 ) blocks. Properties of the preconditioned matrix are analyzed. Numerical experiments are illustrated to show the efficiency of the new preconditioner.
出处
《大学数学》
2017年第2期20-26,共7页
College Mathematics
基金
四川省教育厅科研项目(14ZB0293)
关键词
鞍点问题
预条件
特征值
迭代法
saddle points
preconditioner
iterative method
eigenvalues