计算物理 ›› 2005, Vol. 22 ›› Issue (5): 412-416.

• 研究论文 • 上一篇    下一篇

一类块三对角矩阵求逆的算法

冉瑞生1, 黄廷祝2, 冷劲松2   

  1. 1. 计算机科学与工程学院, 电子科技大学, 四川 成都 610054;
    2. 应用数学学院, 电子科技大学, 四川 成都 610054
  • 收稿日期:2004-06-01 修回日期:2004-11-09 出版日期:2005-09-25 发布日期:2005-09-25
  • 作者简介:冉瑞生(1976-),male,Chongqing,Ph.D.candidate,research interest in scientific computing.
  • 基金资助:
    Supported by NSFC (60372012)

An Algorithm for the Inverse of a Class ofBlock Tridiagonal Matrices

RAN Rui-sheng1, HUANG Ting-zhu2, LENG Jin-song2   

  1. 1. School of Computer Sci. and Eng., Univ. of Electronic Science & Technology of China, Chengdu 610054, China;
    2. School of Appl. Math., Univ. of Electronic Science & Technology of China, Chengdu 610054, China
  • Received:2004-06-01 Revised:2004-11-09 Online:2005-09-25 Published:2005-09-25
  • Supported by:
    Supported by NSFC (60372012)

摘要: 讨论了一类块三对角矩阵的求逆问题.由块三对角矩阵的LU分解,得到了其逆矩阵块元素的显式表达式.当考虑该表达式的结构特征时,可得到块元素的递推关系式,由此得到一个求逆矩阵的新算法.该算法比已有的块三对角矩阵求逆算法的计算复杂度和计算时间低.

关键词: 块三对角矩阵, 逆矩阵, LU分解, 算法

Abstract: The inverse of a class of block tridiagonal matrices is investigated. With the LU decomposition of the block tridiagonal matrix,an explicit expression of the block inverse elements is obtained. A relation between the inverse elements is found,and a new algorithm for inverting a block tridiagonal matrix is established. The computing complexity and computing time of this algorithm is lower than that of existed algorithms.

Key words: block tridiagonal matrix, the inverse matrix, LU decomposition, algorithm

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