Inclusions and Identities for the Moore‐Penrose Inverse of a Closed Linear Operator
Charles W. Groetsch · Mathematische Nachrichten · 1995
Abstract A number of operator inclusions, and identities, involving the Moore‐Penrose inverse of a closed densely defined linear operator, are presented. Some of these inclusions generalize known identities in the case when the operator is bounded and has closed range. An application to a known compactness criterion for the Moore‐Penrose inverse is also given.