RT Book, Section T1 Universal knots A1 Hilden, Hugh Michael A1 Lozano Imízcoz, María Teresa A1 Montesinos Amilibia, José María A2 Rolfsen, Dale AB This paper contains detailed proofs of the results in the announcement "Universal knots'' [the authors, Bull. Amer. Math. Soc. (N.S.) 8 (1983), 449–450;]. The authors exhibit a knot K that is universal, i.e. every closed, orientable 3-manifold M can be represented as a covering of S3 branched over K, thereby giving an affirmative answer to a question of Thurston. The idea is to start with a 3-fold covering M→S3 branched over a knot and to change it to a covering M→S3 branched over a certain link L4 of four (unknotted) components. This shows that L4 is universal. Then a covering S3→S3 that is branched over a certain link L2 of two components with L4 in the preimage of L2, and a covering S3→S3 that is branched over K with L2 in the preimage of K, are constructed. This shows that L2 and K are universal. The knot K is rather complicated. In a later paper [Topology 24 (1985), no. 4, 499–504;] the authors show that the "figure eight'' knot is universal. PB Springe SN 978-3-540-15680-2 YR 1985 FD 1985 LK https://hdl.handle.net/20.500.14352/65468 UL https://hdl.handle.net/20.500.14352/65468 NO Proceedings of a Conference held in Vancouver, Canada, June 2–4, 1983 DS Docta Complutense RD 5 abr 2025