Harvard-MIT Algebraic Geometry Seminar: Enumerativity of fixed-domain Gromov-Witten invariants

SEMINARS, HARVARD-MIT ALGEBRAIC GEOMETRY

Speaker:

Carl Lian - Tufts University

It is well-understood that Gromov-Witten (GW) invariants often fail to be enumerative. For example, when r is at least 3, the higher-genus GW invariants of P^r fail to count smooth curves in projective space in any transparent sense. The situation seems to be better when one fixes the complex structure of the domain curve. It was originally speculated that if X is a Fano variety, then the "fixed-domain" GW count of curves of sufficiently large degree passing through the maximal number of general points is enumerative. I will discuss some positive and negative results in this direction, focusing on the case of hypersurfaces. The most recent results are joint with Roya Beheshti, Brian Lehmann, Eric Riedl, Jason Starr, and Sho Tanimoto, and build on earlier work with Rahul Pandharipande and Alessio Cela.

For more information, please see https://researchseminars.org/seminar/harvard-mit-ag-seminar