Geometry & Topology Seminar

**NOTE NEW TIME**

Qaasim Shafi, Imperial College London

"Gromov-Witten invariants of Blow-ups"

Gromov-Witten invariants play an essential role in mirror symmetry and enumerative geometry. Despite this, there are few effective tools for computing Gromov-Witten invariants of blow-ups. Blow-ups of X can be rewritten as subvarieties of Grassmann bundles over X. In joint work with Tom Coates and Wendelin Lutz, we exploit this fact and extend the abelian/non-abelian correspondence, a modern tool in Gromov-Witten theory. Combining these two steps allows us to get at the genus 0 invariants of a large class of blow-ups. 

This seminar will be held jointly online and in person:

• Zoom link: https://zoom.us/j/93859138328; Passcode: 436044
• Room: MC 5417