Perturbation results and forward order law for the Moore–Penrose inverse in rings with involution
Nadica Mihajlović, Dragan S. Djordjević · Georgian Mathematical Journal · 2022
Abstract We investigate perturbations of the Moore–Penrose inverse and forward order law for the Moore–Penrose inverse in rings with involution, and thus we extend some results of Castro–Gonzalez and Hartwig to more general settings.