Characterizations and properties of the matrices a such that AA(−1)(L)− A(−1)(L) A are nonsingular

Author:

Wu Jiabao1,Zuo Kezheng2,Gao Jiale1,Zheng Lu3

Affiliation:

1. Department of Mathematics, School of Mathematics and Statistics, Hubei Normal University, Huangshi, China

2. Department of Mathematics, School of Mathematics and Statistics, Hubei Normal University, Huangshi, China + Teaching Section of Mathematics, Hubei Engineering Institute, Huangshi, China

3. Teaching Section of Mathematics, Hubei Engineering Institute, Huangshi, China

Abstract

In this paper, we consider the co-BD matrices, a class of matrices characterized by the invertibility of AA(?1)(L)? A(?1) (L) A, where A(?1) (L) is the Bott-Duffin inverse of A with respect to a subspace L. Different characterizations and properties of this class of matrices are given. Also, we consider some characterizations of the nonsingularity of AA(?1) (L) + A(?1) (L) A and In ? A(A(?1)(L))2A.

Publisher

National Library of Serbia

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