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Higher genus Gromov-Witten invariants from projective bundles on smooth log Calabi-Yau pairs

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arxiv 2503.17713 v2 pith:RXIFH3YM submitted 2025-03-22 math.AG math-phmath.MPmath.SG

classification math.AGmath-phmath.MPmath.SG
keywords invariantssmoothgenusgromov-wittenhigherall-genuscalabi-yaudegeneration
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abstract

Let $(X,E)$ be a smooth log Calabi-Yau pair consisting of a smooth Fano surface $X$ and a smooth anticanonical divisor $E$. We obtain certain higher genus local Gromov-Witten invariants from the projectivization of the canonical bundle $Z := \mathbb{P}(K_X \oplus \mathcal{O}_X)$, using the degeneration formula for stable log maps [KLR]. We evaluate an invariant in the degeneration using the relationship between $q$-refined tropical curve counting and logarithmic Gromov-Witten theory with $\lambda_g$-insertion [Bou]. As a corollary, we use flops to prove a blow up formula for higher genus invariants of $Z$. Additionally assuming $X$ is toric, we prove an all-genus correspondence between open invariants of an outer Aganagic-Vafa brane $L \subset K_X$ and closed invariants of $Z$ that generalizes a genus-0 open-closed equality of [Cha] to all-genus, by using an argument in [GRZZ].

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  1. Enumerating log rational curves on some toric varieties

    math.AG 2025-06 conditional novelty 7.0 of 10

    All genus 0 logarithmic Tevelev degrees of X=P_{P^r}(O^s⊕O(-a)) are determined by a closed formula, and the separate conjecture for blow-ups of P^2 at two points is disproven.

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