Jianhua Wang
Published 2002-05-28, updated 2002-06-06Version 3
We discuss the relationship between the m-th homotopy group of the one-point union of r copies of the two-dimensional sphere and the m-th homotopy group of the one-point union of r+1 copies of the Thom space of the oriented two-dimensional universal vector bundle. Using a suitably choosen isomorphism between them a forgetful homomorphism is computed by evaluating on factors of the Hilton splitting.
Comments: 5 figures; revised on 6 June
Homology 3-spheres in codimension three
Cocycle invariants of codimension 2-embeddings of manifolds
On codimension two embeddings up to link-homotopy
![QR code for arXiv:math/0205300 [math.GT]](http://oss.arxitics.com/images/favicon.svg)