Mathematics Colloquia and Seminars

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Trisections as singular branched covers


Speaker: Jeff Meier, Western Washington University
Location: Zoom
Start time: Tue, Dec 1 2020, 1:10PM

The goal of this talk will be to discuss a trisection-theoretic approach to the conjecture that every simply connected, smooth four-manifold is a 3-fold branched cover over the four-sphere. For context, I will survey known results and open questions regarding characterizations of manifolds in dimensions three and four as branched coverings. I will begin with a gentle introduction to irregular branched coverings. This talk is based on joint work with Blair, Cahn, and Kjuchukova.