|Date: Wednesday, February 21, 2018
Location: 4096 East Hall (4:10 PM to 5:30 PM)
Title: Deformation and derived equivalent but non-birational Calabi-Yau threefolds
Abstract: I will construct a pair of Calabi-Yau 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 Calabi-Yau 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.
Speaker: Alex Perry
Institution: Columbia University