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oai:docta.ucm.es:20.500.14352/507522023-08-25T17:10:41Zcom_20.500.14352_14col_20.500.14352_15

On Cantor sets in 3-manifolds and branched coverings Montesinos Amilibia, José María 515.1 3-manifolds Topología 1210 Topología In 1969 R. P. Osborne [Fund. Math. 65 (1969), 147–151;] proved that any Cantor set in an n-manifold (open or closed) is tamely embedded in the boundary of a k-cell, for every 2≤k≤n. In the present work the author generalizes Osborne's result in the particular case where the manifold has dimension 3. Namely, he proves the following: Theorem 2. Let C be a Cantor set in an orientable 3-manifold M (open or closed). Then there exist a (possibly empty) 0-dimensional subset R of S3, a k-cell Δk⊂M (k=2,3), and a 3-fold covering p:M→S3−R, branched over a locally finite disjoint union of strings, such that (i) C is tamely embedded in the boundary of Δk, (ii) p|Δk is a homeomorphism onto its image, (iii) p(Δk) is a tamely embedded k-cell in S3−R, and (iv) p(C) is a tame Cantor set T in S3−R tamely embedded in the boundary of p(Δk). The proof is based on previous work of the author on branching coverings of 3-manifolds. Depto. de Álgebra, Geometría y Topología Fac. de Ciencias Matemáticas TRUE pub 2023-06-20T10:36:30Z 2023-06-20T10:36:30Z 2003-06 journal article https://hdl.handle.net/20.500.14352/50752 0033-5606 10.1093/qmath/hag007 metadata only access Oxford University Press