Cappell-Shaneson's 4-dimensional s-cobordism
arXiv:math/0208092 · doi:10.2140/gt.2002.6.425
Abstract
In 1987 S Cappell and J Shaneson constructed an s-cobordism H from the quaternionic 3-manifold Q to itself, and asked whether H or any of its covers are trivial product cobordism? In this paper we study H, and in particular show that its 8-fold cover is the product cobordism from S^3 to itself. We reduce the triviality of H to a question about the 3-twist spun trefoil knot in S^4, and also relate this to a question about a Fintushel-Stern knot surgery.
70 pages, 146 figures in colour, published by Geometry and Topology at http://www.maths.warwick.ac.uk/gt/GTVol6/paper16.abs.html