Module Amenability of Restricted Semigroup Algebras Under Module Actions


Abbas Sahleh, Somaye Grailo Tanha




In this article, we show that module amenability with the canonical action of restricted semigroup algebra $l^1_r(S)$ and semigroup algebra $l^1(S_r)$ are equivalent, where $S_r$ is the restricted semigroup of associated to the inverse semigroup $S$. We use this to give a characterization of module amenability of restricted semigroup algebra $l^1_r(S)$ with the canonical action, where $S$ is a Clifford semigroup.