The quantum orbifold cohomology of weighted projective spaces

The quantum orbifold cohomology of weighted projective spaces
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加权射影空间的量子轨道上同调

DOI:
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发表时间:
2006
期刊:
影响因子:
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通讯作者:
Hsian
Hsian
中科院分区:
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文献类型:
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作者:
T. Coates;A. Corti;Yuan;Hsian

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我们计算了任意权射影空间的小量子上同调。我们把Givental的启发式证明推广到加权射影空间,并由此猜想出小J-函数的显式公式,小J-函数是某些亏格为零的Gromov-Witten不变量的生成函数。我们用Bertram提出的方法证明了这一猜想。这提供了第一个非平凡的例子,它是已知小量子上同调的一族任意维的奥比霍尔族。此外,我们还得到了满足一个组合条件的加权射影完全交的小J-函数的公式;这个条件自然地挑出了一类具有终端奇异性的轨道。
We calculate the small quantum orbifold cohomology of arbitrary weighted projective spaces. We generalize Givental’s heuristic argument, which relates small quantum cohomology to S1-equivariant Floer cohomology of loop space, to weighted projective spaces and use this to conjecture an explicit formula for the small J-function, a generating function for certain genus-zero Gromov–Witten invariants. We prove this conjecture using a method due to Bertram. This provides the first non-trivial example of a family of orbifolds of arbitrary dimension for which the small quantum orbifold cohomology is known. In addition we obtain formulas for the small J-functions of weighted projective complete intersections satisfying a combinatorial condition; this condition naturally singles out the class of orbifolds with terminal singularities.
计算亏格零扭曲 Gromov-Witten 不变量
DOI: 10.1215/00127094-2009-015
发表时间: 2009
影响因子: 2.5
作者:
Coates T
通讯作者: Coates T