2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/59024We show, following W. Holsztynski, that there exists a continuous metric d on the set of real numbers R such that any finite metric space is isometrically embeddable into (R,d).3 pagesGeneral Topology54E35Universal metric spaces according to W. Holsztynskitext