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arXiv 2003.09838math.AG
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根栈的Gromov-Witten不变量与循环公理

Gromov--Witten invariants of root stacks with mid-ages and the loop axiom

Fenglong You

摘要:

当$r$足够大时,研究了具有一对中间年龄的$r$次根栈$X_{D,r}$的轨道不变量.证明了具有一对中年$k_a/r$和$1-k_a/r$的亏格$g$不变量在$k_a$中是多项式,并且$k_a^i$ -系数在$r$中是多项式,其次数以$2g$为界.此外,具有一对中间年龄的亏格零不变量与中间年龄的选择无关。作为应用,我们得到了相对Gromov-Witten理论的一个恒等式,它可以看作是通常循环公理的一个修正版本。

英文摘要:

We study orbifold Gromov--Witten invariants of the $r$-th root stack $X_{D,r}$ with a pair of mid-ages when $r$ is sufficiently large. We prove that genus $g$ invariants with a pair of mid-ages $k_a/r$ and $1-k_a/r$ are polynomials in $k_a$ and the $k_a^i$-coefficients are polynomials in $r$ with degree bounded by $2g$. Moreover, genus zero invariants with a pair of mid-ages are independent of the choice of mid-ages. As an application, we obtain an identity for relative Gromov--Witten theory which can be viewed as a modified version of the usual loop axiom.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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