Cusp equivalence between smooth embeddings of the 2-sphere in 4-space
Geometric Topology
2016-09-07 v1
Abstract
If the fundamental group of the complement of a smooth embedding f: S^2 \subset R^4 is a cyclic group, the map can be deformed to the standard embedding by a generic one-parameter family with at most cusp singularities. If two smooth embeddings are connected by such a deformation, they will be called cusp equivalent. We will discuss the relation of three equivalences of smooth 2-knots S^2 \subset R^4; cusp equivalence, stable equivalence and weakly stable equivalence.
Cite
@article{arxiv.math/9911257,
title = {Cusp equivalence between smooth embeddings of the 2-sphere in 4-space},
author = {Takao Matumoto},
journal= {arXiv preprint arXiv:math/9911257},
year = {2016}
}
Comments
6 pages. Published copy, also available at http://www.maths.warwick.ac.uk/gt/GTMon2/paper19.abs.html