سال انتشار: ۱۳۸۵

محل انتشار: شانزدهمین سمینار آنالیز ریاضی و کاربردهای آن

تعداد صفحات: ۵

نویسنده(ها):

H. G. DALES – Invited Speaker

چکیده:

We recall the definitions of amenable and weakly amenable Banach algebras, and give equivalent formulations. We define the semigroup algebra of a semigroup, and explain when these algebras are amenable. We explain that their second duals are never amenable when the semigroup is infinite. We also state that the second dual of a group algebra L^1(G), for a locally compact group G, is weakly amenable if and only if G is finite.