–a notion of amenability for topological semigroups is introduced. a topological semigroup s iscalled johnson amenable if for every banach s -bimodule e , every bounded crossed homomorphism froms to e* is principal. in this paper it is shown that a discrete semigroup s is johnson amenable if and only if1(s) is an amenable banach algebra. also, we show that if a topological semigroup s is johns...

A. M. S. Classification: 18G30, 18G55.

conclusions the patient underwent surgery applying a midline incision. the left kidney showed a lump pattern embedded in lower pole of the right kidney. left sided nephrectomy was performed while temporary right renal artery was clamped temporarily. histopathological evaluation revealed clear cell carcinoma with severe nuclear atypia (fuhrman grade 4/4). however, local recurrence was not detect...