2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/77548In this paper we define the concepts of $g.Λ_s$-sets and $g.V_s$-sets and we use them in order to obtain new characterizations of semi-T_1-, semi-R_0- and semi-T_{1/2}-spaces.12 pagesGeneral Topology54D30; 54A05; 54H05; 54G99text