arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.08991math.AG
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多根栈的镜像定理及其应用

A mirror theorem for multi-root stacks and applications

Hsian-Hua Tseng, Fenglong You

摘要:

给定一个光滑射影簇$X$,它具有一个单正规交叉因子$D:=D_1+D_2+...+D_n$,其中$D_i\subset X$是光滑的,不可约的,nef.通过构造一个$I$ -函数,证明了多根栈$X_{D,\vec r}$的镜像定理.我们提供了三个应用:(1)证明了$X_{D,\vec r}$的某些亏格零不变量对足够大的$\vec r$是稳定的. (2)(3)利用$X_{D,\vec r}$的轨道不变量证明了Fano簇的正则化量子周期与镜像Landau-Ginzburg势的经典周期一致。

英文摘要:

Given a smooth projective variety $X$ with a simple normal crossing divisor $D:=D_1+D_2+...+D_n$, where $D_i\subset X$ are smooth, irreducible and nef. We prove a mirror theorem for multi-root stacks $X_{D,\vec r}$ by constructing an $I$-function, a slice of Givental's Lagrangian cone for Gromov--Witten theory of multi-root stacks. We provide three applications: (1) We show that some genus zero invariants of $X_{D,\vec r}$ stabilize for sufficiently large $\vec r$. (2) We state a generalized local-log-orbifold principle conjecture and prove a version of it. (3) We show that regularized quantum periods of Fano varieties coincide with classical periods of the mirror Landau--Ginzburg potentials using orbifold invariants of $X_{D,\vec r}$.

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