2026-08-20T06:03:34Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/646992023-08-28T04:18:09Zcom_20.500.14352_14col_20.500.14352_15

Montesinos Amilibia, José María Hilden, Hugh Michael Lozano Imízcoz, María Teresa 2023-06-21T02:02:46Z 2023-06-21T02:02:46Z 1983 0273-0979 10.1090/S0273-0979-1983-15114-5 https://hdl.handle.net/20.500.14352/64699 http://www.ams.org/journals/bull/1983-08-03/S0273-0979-1983-15114-5/S0273-0979-1983-15114-5.pdf http://www.ams.org/home/page In an unpublished preprint W. Thurston showed the existence of a six component link in the 3-sphere such that every three-manifold can be expressed as a branched cover of the 3-sphere branched over this link. He called links with this property "universal links'' and asked if a universal knot exists. The authors confirm this by showing that any link can be embedded in the branch locus of a 3-sphere branched covering of a 3-sphere branched over a knot eng restricted access Universal knots journal article