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J4 ›› 2013, Vol. 48 ›› Issue (4): 95-103.

• 论文 • 上一篇    下一篇

关于两个幂等算子组合的Drazin逆的若干探讨

谢涛,左可正   

  1. 湖北师范学院数学与统计学院, 湖北 黄石 435002
  • 收稿日期:2012-10-22 出版日期:2013-04-20 发布日期:2013-04-16
  • 作者简介:谢涛(1980- ),男,硕士,讲师,研究方向为线性代数及其应用. Email:xietao-1294@163.com
  • 基金资助:

    湖北省教育厅重点项目(D20122202);湖北省教育厅青年项目(B20122203)

XIE Tao, ZUO Ke-zheng   

  1. College of Mathematic and Statistic, Hubei Normal Univesity, Huangshi 435002, Hubei, China
  • Received:2012-10-22 Online:2013-04-20 Published:2013-04-16

摘要:

利用Hilbert空间上空间分解的技巧,讨论了两个幂等算子P,Q在条件PQP=0,PQP=P及PQP=PQ下的矩阵表示,探讨了组合aP+bQ+cPQ+dQP+eQPQ的Drazin逆的存在性,并且给出了Drazin逆的计算公式。

关键词: 幂等算子;Drazin逆;组合

Abstract:

The matrix represenations of two idempotent operators P and Q under the conditions PQP=0, PQP=P and PQP=PQ are discussed respectively by using the technique of space decompositions of a Hilbert space. The existance and calculation formulas of Drazin inverse of the combinations aP+bQ+cPQ+dQP+eQPQ of the two idempotent operators are obtained.

Key words: idempotent operator; Drazin inverse; combination

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