Derivations on Dual Triangular Banach Algebras

Ideal Connesamenability of dual Banach algebras was investigated in [17] by A. Minapoor, A. Bodaghi and D. Ebrahimi Bagha. They studied weak^∗-continuous derivations from dual Banach algebras into their weak^∗-closed two sided ideals. This work considers weak^∗-continuous derivations of dual triangular Banach algebras into their weak^∗-closed two-sided ideals . We investigate when weak^∗-continuous derivations from these algebras into their weak^∗-closed ideals are inner?