Generalization of the weak amenability on various Banach algebras

Abstract

The generalized notion of weak amenability, namely $(\varphi,\psi)$-weak amenability, where $\varphi,\psi$ are continuous homomorphisms on a Banach algebra ${\mathcal A}$, was introduced by Bodaghi, Eshaghi Gordji and Medghalchi (2009). In this paper, the $(\varphi,\psi)$-weak amenability on the measure algebra $M(G)$, the group algebra $L^1(G)$ and the Segal algebra $S^1(G)$, where $G$ is a locally compact group, are studied. As a typical example, the $(\varphi,\psi)$-weak amenability of a special semigroup algebra is shown as well.

Keywords

• Banach algebra
• $(\varphi,\psi)$-derivation
• group algebra
• locally compact group
• measure algebra
• Segal algebra
• weak amenability