QUANTUM COHOMOLOGY OF A

QUANTUM COHOMOLOGY OF A
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A 的量子上同调

DOI:
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发表时间:
1999
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通讯作者:
A. Farmery
A. Farmery
中科院分区:
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文献类型:
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作者:
R. Bruce;D. Crockett;Anna Morgan;M. Tran;F. Formenti;P. Phan;A. Farmery

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具有Γ(OP6(1))-系数的一般偏对称7 × 7矩阵的第4阶简并轨迹定义了一个h1,1 = 1的非完全交Calabi-Yau 3-fold X3。我们回顾了Rødland[21]关于X3的镜像对称性的一些结果:一个势镜像族Yq被构造为(一个分辨率)的轨道x3q /Z7,其中x3q是在所有斜对称的7 × 7矩阵空间上的一个自然Z7作用的单参数不变量族。结果表明,Yq的霍奇金刚石与x3的霍奇金刚石是镜像的。进一步,在最大单幂单性点1处,周期的Picard-Fuchs算子计算为(D = q D dq):(1−289q−57q +q)(1−3q)D +4q(3q−1)(143 + 57q−87q + 3q)D +2q(−212−473q + 725q−435q + 27q)D +2q(−69−481q + 159q−171q + 18q)D +q(−17−202q−8q−54q + 9q)。(1)
The rank 4 degeneracy locus of a general skew-symmetric 7 × 7-matrix with Γ(OP6(1))-coefficients defines a non-complete intersection Calabi-Yau 3-fold X3 with h1,1 = 1. We recall some results of Rødland [21] on the mirror symmetry of X3: a potential mirror family Yq is constructed as (a resolution of) the orbifold X3 q /Z7, where X 3 q is a one-parameter family of invariants of a natural Z7-action on the space of all skew-symmetric 7 × 7-matrices. It is shown that the Hodge-diamond of Yq mirrors the one of X 3. Further, at a point of maximal unipotent monodromy1, the Picard-Fuchs operator for the periods is computed to be (with D = q d dq ): (1 − 289q − 57q + q)(1 − 3q)D +4q(3q − 1)(143 + 57q − 87q + 3q)D +2q(−212 − 473q + 725q − 435q + 27q)D +2q(−69 − 481q + 159q − 171q + 18q)D +q(−17 − 202q − 8q − 54q + 9q) . (1)