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
中科院分区:
文献类型:
--
作者:
H. Iritani
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].