Knotted contractible 4-manifolds in the 4-sphere

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Examples are given to show that some compact contractible 4-manifolds can be knotted in the 4-sphere. It is then proved that any finitely presented perfect group with a balanced presentation is a knot group for an embedding of some contractible 4-manifold in the 4-sphere.
Six pages with two figures

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Geometric Topology, Primary 57Q45; Secondary 57M20, 57M2

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http://salesiana.dossiersoluciones.com/handle/123456789/61939

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0107227
 http://arxiv.org/abs/math/0107227

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arXiv