Knotted contractible 4-manifolds in the 4-sphere
Geometric Topology
2007-05-23 v2
Abstract
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.
Cite
@article{arxiv.math/0107227,
title = {Knotted contractible 4-manifolds in the 4-sphere},
author = {W. B. R. Lickorish},
journal= {arXiv preprint arXiv:math/0107227},
year = {2007}
}
Comments
Six pages with two figures