2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/70949In this paper, we discuss characterizations of common fixed points of commutative semigroups of nonexpansive mappings. We next prove convergence theorems to a common fixed point. We finally discuss nonexpansive retractions onto the set of common fixed points. In our discussion, we may not assume the strict convexity of the Banach space.18 pagesFunctional Analysis47H20text