%0 Journal Article
%T Cappell-Shaneson homotopy spheres are standard
%A Selman Akbulut
%J Mathematics
%D 2009
%I arXiv
%X We show that an infinite sequence of homotopy 4-spheres constructed by Cappell-Shaneson are all diffeomorphic to S^4. This generalizes previous results of Akbulut-Kirby and Gompf.
%U http://arxiv.org/abs/0907.0136v3