On the maximality of the sum of two maximal monotone operators (Q5895387)

Several conditions under which the sum of two maximal monotone operators A and B in a Hilbert space H is again maximal monotone are due to H. Attouch, H. Brézis, R. T. Rockafellar, and others. Here the author studies the condition that the set \[ H_ 0=\cup_{\lambda \geq 0}\lambda (dom B-dom A) \] is a closed linear subspace of H.