A further note on a theorem on the difference of the generalized inverses of two nonnegative definite matrices
Erkki P. Liski, Simo Puntanen · Communication in Statistics- Theory and Methods · 1989
Andrews and Phillips (1986) gave a simplified proof for the result that established the nonnegative definiteness of the difference of the Moore-Penrose inverses of two nonoegative definite matrices, a result originally due to Milliken and Akdeniz (1977), The purpose of this paper is to offer a simple proof for a generalization of this result,