2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/105074The purpose of this paper is extend the notion of morphism of groupoids introduced by Zakrzewski to locally compact $σ$-compact groupoids endowed with Haar systems and to use the extension to construct a covariant functor from this category to a category of $C^{\ast}$-algebras in the sense of Woronowicz.31 pagesOperator AlgebrasFunctional Analysis22A22; 43A22; 46L99text