# CMSA Mathematical Physics Seminar: Fourier–Mukai equivalences arising from Cremona transformations I: K3 surfaces

CMSA EVENTS

##### Speaker:

Kuan-Wen Lai *- University of Massachusetts Amherst*

*will speak on:*

The derived equivalences of K3 surfaces and the K3 categories of certain cubic fourfolds are known to be realizable as Hodge isometries, i.e. lattice isometries preserving Hodge structures. On the other hand, Hodge isometries are also known to appear when one factorizes a birational map between varieties and tracks the actions on the middle cohomologies. When does a Hodge isometry induced from the derived equivalence of K3 surfaces/categories arise from a birational map? This is the first of two related talks discussing this question. In this talk, I will exhibit such examples for general K3 surfaces of degree 12. As a corollary, I will introduce how the construction gives an interesting relation in the Grothendieck ring of algebraic varieties. This is joint work with Brendan Hassett.

**via Zoom Video Conferencing: https://harvard.zoom.us/j/837429475**