A thick-restarted block Arnoldi algorithm with modified Ritz vectors for large eigenproblems

A thick-restarted block Arnoldi algorithm with modified Ritz vectors for large eigenproblems
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针对大型特征问题的带有修改 Ritz 向量的厚重启动块 Arnoldi 算法

DOI:
10.1016/j.camwa.2010.05.034
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发表时间:
2010-08
期刊:
COMPUTERS & MATHEMATICS WITH APPLICATIONS
影响因子:
--
通讯作者:
Wu, Gang
Wu, Gang
中科院分区:
其他
文献类型:
--
作者:
Jiang, Wei;Wu, Gang

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块Arnoldi方法是求解大型特征问题最常用的技术之一。本文利用某些修正的Ritz向量来代替稠密重启块Arnoldi算法中的Ritz向量,提出了一种求解大型特征问题的修正的厚重启块Arnoldi算法。然后,我们考虑如何周期性地将精化子空间迭代法与改进的厚重启块Arnoldi算法相结合来计算大型矩阵的几个主导特征对。由此产生的算法称为子空间-块Arnoldi算法。数值实验表明了新算法的有效性。
The block Arnoldi method is one of the most commonly used techniques for large eigenproblems. In this paper, we exploit certain modified Ritz vectors to take the place of Ritz vectors in the thick-restarted block Arnoldi algorithm, and propose a modified thick-restarted block Arnoldi algorithm for large eigenproblems. We then consider how to periodically combine the refined subspace iterative method with the modified thick-restarting block Arnoldi algorithm for computing a few dominant eigenpairs of a large matrix. The resulting algorithm is called a Subspace-Block Arnoldi algorithm. Numerical experiments show the efficiency of our new algorithms.
DOI: 10.1243/pime_proc_1954_168_053_02
发表时间: 1954-06
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