Invariant $\phi$-means on multiplier completion of Banach algebras with application to hypergroups

Mehdi Nemati, Maryam Rajaei Rizi

Let $\mathcal{A}$ be a Banach algebra and let $\phi$ be a non-zero character on $\mathcal{A}$. Suppose that ${\mathcal{A}}_M$ is the closure of the faithful Banach algebra ${\mathcal…