An integral structure in quantum cohomology and mirror symmetry for toric orbifolds

An integral structure in quantum cohomology and mirror symmetry for toric orbifolds
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DOI:
10.1016/j.aim.2009.05.016
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发表时间:
2009-03
影响因子:
1.7
通讯作者:
H. Iritani
H. Iritani
中科院分区:
数学1区
文献类型:
--
作者:
H. Iritani

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我们引入了与K-群和Γ-类相关的轨道量子上同调的积分结构。在紧凑的复曲面orbifolds的情况下,我们表明,这种积分结构与自然的积分结构的朗道-金兹伯格模型下镜像对称。通过假设一个整体结构的存在,我们给出了一个自然的解释为特化的一个根的单位在Y。阮永斌,关于轨道折叠的可裂归结的上同调环,见:Contemp.数学、第403卷,美国数学学会,普罗维登斯,RI,2006年,pp. 117-126]。
We introduce an integral structure in orbifold quantum cohomology associated to the K-group and the Γˆ-class. In the case of compact toric orbifolds, we show that this integral structure matches with the natural integral structure for the Landau–Ginzburg model under mirror symmetry. By assuming the existence of an integral structure, we give a natural explanation for the specialization to a root of unity in Y. Ruan's crepant resolution conjecture [Yongbin Ruan, The cohomology ring of crepant resolutions of orbifolds, in: Contemp. Math., vol. 403, Amer. Math. Soc., Providence, RI, 2006, pp. 117–126].