Date: Thursday, November 18, 2021
Location: 3866 East Hall (3:00 PM to 4:00 PM)
Title: Probing homotopy 4spheres using "nearly" symplectic geometry
Abstract: Most closed 4manifolds don't admit symplectic forms, but they admit "nearsymplectic" 2forms that are symplectic away from some circles. I will introduce them to probe homotopy 4spheres, by counting certain Riemann surfaces in the complement of these circles. The dream is that these will be sensitive enough to distinguish potentially exotic 4spheres... but maybe it's a nightmare.
Files:
Speaker: Chris Gerig
Institution: SCGP, Stony Brook
Event Organizer: Linh Truong
