RT Journal Article T1 Open 3-manifolds as 3-fold branched coverings. A1 Montesinos Amilibia, José María AB It is announced that the Freudenthal compactification of an open, connected, oriented 3-manifold is a 3-fold branched covering of S 3 . The branching set is as nice as can be expected. Some applications are given. PB Real Academia Ciencias Exactas Físicas Y Naturales SN 1578-7303 YR 2001 FD 2001 LK https://hdl.handle.net/20.500.14352/58648 UL https://hdl.handle.net/20.500.14352/58648 LA eng DS Docta Complutense RD 21 abr 2025