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
期刊:
影响因子:
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通讯作者:
A. Farmery
中科院分区:
文献类型:
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作者:
R. Bruce;D. Crockett;Anna Morgan;M. Tran;F. Formenti;P. Phan;A. Farmery
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)