LATOP at Caltech, Talk 2

Monday, December 4, 2017 at 5:00pm to 6:00pm

This is a past event.

Caltech, 201 E. Bridge

Zhouli Xu, MIT

Title: “Smooth structures, stable homotopy groups of spheres and motivic homotopy theory”

Abstract: Following Kervaire-Milnor, Browder and Hill-Hopkins-Ravenel, Guozhen Wang and I showed that the 61-sphere has a unique smooth structure and is the last odd dimensional case: $S^1, S^3, S^5$ and $S^{61}$ are the only odd dimensional spheres with a unique smooth structure. The proof is a computation of stable homotopy groups of spheres. We introduce a method that computes differentials in the Adams spectral sequence by comparing with differentials in the Atiyah-Hirzebruch spectral sequence for real projective spectra through Kahn-Priddy theorem. I will also discuss recent progress of computing stable stems using motivic homotopy theory with Dan Isaksen and Guozhen Wang.


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