|October 11th, 2016, 07:52 AM||#1|
Joined: Mar 2009
Have any exotic S^4 manifolds been discovered? If an exotic R^4 manifold is known to exist, and you add a point at infinity, doesn't that compactify it to an exotic S^4 manifold?
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|Quest for the 4D Exotic Sphere||HawkI||Topology||8||February 27th, 2016 11:36 AM|