Timeline for What are the uses of the homotopy groups of spheres?
Current License: CC BY-SA 2.5
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| Oct 22, 2020 at 15:39 | comment | added | Connor Malin | @TimPerutz I have seen the term "inertia group" used by Weiss to refer to the subgroup of the exotic spheres which connect summing with does not change the diffeomorphism type of a specified manifold. | |
| Apr 30, 2010 at 3:16 | comment | added | Tim Perutz | Igor, I guess the easy(ish) way out is to prove classification theorems up to connect sum with a homotopy-sphere. But I wonder how much we lose this way. Does connect summing with an exotic sphere always changes the manifold? | |
| Apr 28, 2010 at 23:34 | history | answered | Igor Belegradek | CC BY-SA 2.5 |