Derivation into duals of ideals of Banach algebras

M E Gorgi, T Yazdanpanah

We introduce two notions of amenability for a Banach algebra $\mathcal{A}$. Let $I$ be a closed two-sided ideal in $\mathcal{A}$, we say $\mathcal{A}$ is $I$-weakly amenable if the first cohomolo…