Date: Wednesday, February 21, 2018
Location: 4096 East Hall (4:10 PM to 5:30 PM)
Title: Deformation and derived equivalent but nonbirational CalabiYau threefolds
Abstract: I will construct a pair of CalabiYau threefolds which are deformation and derived equivalent, but not birationally equivalent. I will explain how this gives a counterexample to the birational Torelli problem for CalabiYau threefolds, as well as new examples of zero divisors in the Grothendieck ring of varieties. This is joint work with Lev Borisov and Andrei Caldararu.
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Speaker: Alex Perry
Institution: Columbia University
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