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arXiv · 2509.06004

Refined floor diagrams relative to a conic and Caporaso-Harris type formula

Yanqiao Ding·Jianxun Hu
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Abstract

We prove a $q$-refined correspondence theorem between higher genus relative Gromov-Witten invariants with a Lambda class $\lambda_{g-g'}$ insertion in the blow-up of $\mathbb{P}^2$ at $k$ points on a conic and the refined counts of genus $g'$ floor diagrams relative to a conic, after the change of variables $q=e^{iu}$. We provide a Caporaso-Harris type recursive formula for the refined counts of higher genus floor diagrams. As an application of the correspondence theorem, we propose a higher genus version of the BPS polynomials of del Pezzo surfaces of degree $\geq3$ and Hirzebruch surfaces, which generalize the higher genus Block-G\"ottsche polynomials.

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Yanqiao Ding, Jianxun Hu. 2025-09-07. Refined floor diagrams relative to a conic and Caporaso-Harris type formula. https://arxiv.org/abs/2509.06004

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