The aim of this paper is to show an application of the recently introduced -bounded semigroups in the theory of implicit and degenerate evolution equations. The most interesting feature of this approach is its applicability to problems with noncloseable operators.
"$B$-bounded semigroups and implicit evolution equations." Abstr. Appl. Anal. 5 (1) 13 - 32, 2000. https://doi.org/10.1155/S1085337500000087