吉林大学学报(理学版) ›› 2023, Vol. 61 ›› Issue (4): 739-744.

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两矩阵和的Drazin逆表示

郭丽, 王安琪, 侯宇, 栾天   

  1. 北华大学 数学与统计学院, 吉林 吉林 132013
  • 收稿日期:2022-12-05 出版日期:2023-07-26 发布日期:2023-07-26
  • 通讯作者: 栾天 E-mail:luantian@163.com

Representations of Drazin Inverse of  Sum for Two Matrices

GUO Li, WANG Anqi, HOU Yu, LUAN Tian   

  1. School of Mathematics and Statistics, Beihua University, Jilin 132013, Jilin Province, China
  • Received:2022-12-05 Online:2023-07-26 Published:2023-07-26

摘要: 考虑两个矩阵之和的Drazin逆的表示. 对于n阶矩阵P,Q, 利用Cline公式及Drazin逆的性质给出在P2QP2=0, P3QP=0, PQ3=0, PQ2P=0, P2QPQ=0等条件下两矩阵和P+Q的Drazin逆的表达式.

关键词: 广义逆, Drazin逆, 指标

Abstract: We considered the representation of the Drazin inverses of the sum for two matrices. For n-|th order matrices P and Q, the expression  of the Drazin inverse of the sum for two matrices P+Q was given by using the Cline formula and the properties of Drazin inverse under the conditions such as  P2QP2=0, P3QP=0, PQ3=0, PQ2P=0, P2QPQ=0, etc.

Key words: generalized inverse, Drazin inverse, index

中图分类号: 

  • O151.21