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Low dimensional topology learning seminar

The wild world of 4-manifolds

Sriram Raghunath

Location:  zoom link:
Date & time: Thursday, 21 October 2021 at 3:00PM - 4:00PM

In this talk, we will discuss exotic smooth structures on 4-manifolds. We will explicitly construct an exotic structure on R4 and sketch a proof of why it is not diffeomorphic to the standard smooth structure on R4. Along the way, we will touch upon pathbreaking results in 4-manifold topology by Freedman, Quinn, Donaldson, Taubes and Uhlenbeck.

Title credits: Alexandru Scorpan