EVENT DETAILS AND ABSTRACT

Title: Deformation and derived equivalent but non-birational Calabi-Yau threefolds
Speaker: Alexander Perry
Speaker Info: Columbia University
Brief Description:
Special Note:
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.