Fox reimbedding and Bing submanifolds

Details Fox reimbedding and Bing submanifolds Fox reimbedding and Bing submanifolds

2012-02-18

arxiv.org/abs/1202.4062v1

Mathematics

Geometric Topology

22 pages, 4 figures

Scientific paper

Let M be an orientable closed connected 3-manifold. We introduce the notion of amalgamated Heegaard genus of M with respect to a closed separating 2-manifold F, and use it to show that the following two statements are equivalent: (i) a compact connected 3-manifold Y can be embedded in M so that the exterior of the image of Y is a union of handlebodies; and (ii) a compact connected 3-manifold Y can be embedded in M so that every knot in M can be isotoped to lie within the image of Y . Our result can be regarded as a common generalization of the reimbedding theorem by Fox [Fox48] and the characterization of 3-sphere by Bing [Bin58], as well as more recent results of Hass and Thompson [HT89] and Kobayashi and Nishi [KN94].

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