All two dimensional links are null homotopic
Geometric Topology
2014-11-11 v2
Abstract
We show that any number of disjointly embedded 2-spheres in 4-space can be pulled apart by a link homotopy, ie, by a motion in which the 2-spheres stay disjoint but are allowed to self-intersect.
Keywords
Cite
@article{arxiv.math/0004021,
title = {All two dimensional links are null homotopic},
author = {Arthur Bartels and Peter Teichner},
journal= {arXiv preprint arXiv:math/0004021},
year = {2014}
}
Comments
18 pages. Published copy, also available at http://www.maths.warwick.ac.uk/gt/GTVol3/paper10.abs.html