2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/115450We define the crosscap number of a 2-component link as the minimum of the first Betti numbers of connected, non-orientable surfaces bounding the link. We discuss some properties of the crosscap numbers of 2-component links.15 pages, 10 figuresGeometric Topology57M25text