The Drazin inverse matrix modification formulae with Peirce corners


Daochang Zhang, Dijana Mosić, Jianping Hu




Our motivation is to derive the Drazin inverse matrix modification formulae utilizing the Drazin inverses of adequate Peirce corners under some special cases, and the Drazin inverse of a special matrix with an additive perturbation. As applications, several new results for the expressions of the Drazin inverses of modified matrices A − CB and A − CD d B are obtained, and some well known results in the literature, as the Sherman-Morrison-Woodbury formula and Jacobson's Lemma, are generalized