2025/06/14 by Lopez, Aitor Iribar, Pandharipande, Rahul, Tseng, Hsian-Hua
#Algebraic Geometry (math.AG) #FOS: Mathematics
paper · doi:10.48550/arxiv.2506.12438
We calculate the genus 1 Gromov-Witten theory of the Hilbert scheme Hilbn(ℂ2) of points in the plane. The fundamental 1-point invariant (with a divisor insertion) is calculated using a correspondence with the families local curve Gromov-Witten theory over the moduli space M1,1. The answer exactly matches a parallel calculation related to the Noether-Lefschetz geometry of the moduli space Ag of principally polarized abelian varieties. As a consequence, we prove that the associated cycle classes satisfy a homomorphism property for the projection operator on CH^*(Ag). The fundamental 1-point invariant determines the full genus 1 Gromov-Witten theory of Hilbn(ℂ2) modulo a nondegeneracy conjecture about the quantum cohomology. A table of calculations is given.