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求解对称正定线性代数方程组的一个代数预处理器
An Algebraic Preconditioner for Solving Symmetric Positive Definite Linear Algebraic Equations
【摘要】 给出一种代数预处理器的构造方法,并用Weyl不等式对该预处理器和分块对角预处理器进行理论分析.理论分析和数值算例均表明,所提出的预处理器优于分块对角预处理器.
【Abstract】 A construction method of algebraic preconditioner was given, and the proposed preconditioner and block diagonal preconditioner were analyzed theoretically by using the Weyl inequality. Both theoretical analyses and numerical examples show that the performance of the proposed preconditioner is better than that of the block diagonal preconditioners.
【关键词】 线性代数方程组;
共轭梯度法;
预处理器;
条件数;
【Key words】 linear algebraic equations; conjugate gradient method; preconditioner; condition number;
【Key words】 linear algebraic equations; conjugate gradient method; preconditioner; condition number;
【基金】 国家自然科学基金(批准号:11901463)
- 【文献出处】 吉林大学学报(理学版) ,Journal of Jilin University(Science Edition) , 编辑部邮箱 ,2021年01期
- 【分类号】O241.6
- 【下载频次】108