2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/166798In this paper, among other things, we study those conditions under which the weighted semigroup algebra $\ell^1(S,ω)$ is a dual Banach algebra with respect to predual $c_0(S)$. Some useful examples, illustrating the results, are also included.12 pagesFunctional AnalysisOperator Algebras43A10, 43A20, 46H20, 46H25text