The generalized Drazin inverse of operator matrices

Year 2020, , 1134 - 1149, 02.06.2020

Li Guo Honglin Zou Jianlong Chen

https://doi.org/10.15672/hujms.731518

Cited By: 2

Abstract

Representations for the generalized Drazin inverse of an operator matrix $\begin{pmatrix}A & B \\ C & D \end{pmatrix}$ are presented in terms of $A,B,C,D$ and the generalized Drazin inverses of $A,D$, under the condition that $BD^d=0,~\text{and}~BD^iC=0,~\text{for any nonnegative integer}~ i.$ Using the representation, we give a new additive result of the generalized Drazin inverse for two bounded linear operators $P,Q \in \mathbf{B}(X)$ with $PQ^{d}=0$ and $PQ^{i}P=0$, for any integer $i\geq 1$. As corollaries, several well-known results are generalized.

Keywords

Banach space, generalized Drazin inverse, operator matrix

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