A Lefschetz-type Theorem for Quasimap Invariants via Relative Quasimaps

A Lefschetz-type Theorem for Quasimap Invariants via Relative Quasimaps
复制标题

基于相对拟图的拟图不变量的 Lefschetz 型定理

DOI:
--
复制
发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Navid Nabijou
Navid Nabijou
中科院分区:
--
文献类型:
--
作者:
L. Battistella;Navid Nabijou

文献摘要

被引文献

相似文献

本文根据A.加斯曼当$X$是光滑复曲面簇,$Y$是$X$中的一个非常充分的超曲面时,我们在$(X,Y)$的相对拟映射的模空间上构造了一个虚类,它可以用来定义相对拟映射对的相对拟映射不变量。我们得到了一个递归公式,表示每个相对不变量的不变量的低重数。最后,我们应用这个公式推导出一个Lefschetz型定理,表示$Y$的限制性拟映射不变量的$X$。我们包括几个附录收集准映射理论的标准结果的证明。
We define moduli spaces of relative toric quasimaps in genus zero, in the spirit of A. Gathmann. When $X$ is a smooth toric variety and $Y$ is a very ample hypersurface in $X$ we construct a virtual class on the moduli space of relative quasimaps to $(X,Y)$ which can be used to define relative quasimap invariants of the pair. We obtain a recursion formula which expresses each relative invariant in terms of invariants of lower multiplicity. Finally we apply this formula to derive a Lefschetz-type theorem expressing the restricted quasimap invariants of $Y$ in terms of those of $X$. We include several appendices collecting proofs of standard results in quasimap theory.