Montesinos Amilibia, José María2023-06-202023-06-2020011578-7303https://hdl.handle.net/20.500.14352/58648It 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.engjournal articlehttp://www.rac.es/ficheros/doc/00061.pdfhttp://www.rac.es/0/0_1.phprestricted access512.7Freudenthal compactificationOpen 3-manifoldsbranched coveringswild knotGeometria algebraica1201.01 Geometría Algebraica