Topology of spaces of knots in dimension 3

Details Topology of spaces of knots in dimension 3 Topology of spaces of knots in dimension 3

2005-06-25

arxiv.org/abs/math/0506524v4

Proceedings of the London Mathematical Society Vol 101 pt. 2 (Sept. 2010)

Mathematics

Geometric Topology

22 pages, 16 figures

Scientific paper

This paper is a computation of the homotopy type of K, the space of long knots in R^3, the same space of knots studied by Vassiliev via singularity theory. Each component of K corresponds to an isotopy class of long knot, and we `enumerate' the components via the companionship trees associated to the knot. The knots with the simplest companionship trees are: the unknot, torus knots, and hyperbolic knots. The homotopy-type of these components of K were computed by Hatcher. In the case the companionship tree has height, we give a fibre-bundle description of those components of K, recursively, in terms of the homotopy types of `simpler' components of K, in the sense that they correspond to knots with shorter companionship trees. The primary case studied in this paper is the case of a knot which has a hyperbolic manifold contained in the JSJ-decomposition of its complement.

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