On Kaufman's theorem
Journal of Mathematical Analysis and Applications | ACADEMIC PRESS INC ELSEVIER SCIENCE | Published : 2014
Kaufman's theorem (Kaufman, 1978 ) on representing closed linear operators as quotients of bounded operators is given a new constructive proof, and is extended to operators between two Hilbert spaces. Two different definitions of operator quotients existing in the literature are compared. © 2013 Elsevier Inc.