Further characterizations of the weak group inverse of matrices and the weak group matrix
Hui Yan, Hongxing Wang, Kezheng Zuo, Yang Chen · AIMS Mathematics · 2021
This paper is devoted to consider some new characteristics and properties of the weak group inverse and the weak group matrix. First, we characterize the weak group inverse of a square matrix based on its range space and null space. Also several different characterizations of the weak group inverse are presented by projection and the Bott-Duffin inverse. Then by using the core-EP decomposition, we investigate the relationships between weak group inverse and other generalized inverses. And some new characterizations of weak group matrix are obtained.