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arXiv 0802.3376math.AGhep-th
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利用锥状变换构造新的Calabi-Yau 3-折叠及其镜像

Constructing new Calabi-Yau 3-folds and their mirrors via conifold transitions

Victor Batyrev, Maximilian Kreuzer

摘要:

我们构造了一个令人惊讶的大类新的Calabi-Yau 3-folds的$X$与小皮卡德数,并提出了一个建设他们的镜像$X^*$使用光滑的复曲面与锥奇异。这些新的例子是通过conifold转换与以前已知的。我们的结果通过环面退化推广了Grassmannian流形和旗流形中Calabi-Yau完全相交的镜像构造。恰好存在198849个2-面仅为三角形或平行四边形且体积极小的自反4-多面体。每一个这样的多胞形产生一族在最坏的情况下具有锥状奇点的Calabi-Yau超曲面。利用Namikawa的一个准则,我们找到了30241个自反4-多面体,使得相应的Calabi-Yau超曲面可通过平坦变形而光滑。特别是,我们发现了210个自反4-多面体定义68拓扑不同的卡拉比-丘3-折叠$h_{11}=1$。我们解释了镜像建设和计算几个新的Picard-Fuchs运营商各自的1参数家庭的镜像Calabi-Yau 3倍。

英文摘要:

We construct a surprisingly large class of new Calabi-Yau 3-folds $X$ with small Picard numbers and propose a construction of their mirrors $X^*$ using smoothings of toric hypersurfaces with conifold singularities. These new examples are related to the previously known ones via conifold transitions. Our results generalize the mirror construction for Calabi-Yau complete intersections in Grassmannians and flag manifolds via toric degenerations. There exist exactly 198849 reflexive 4-polytopes whose 2-faces are only triangles or parallelograms of minimal volume. Every such polytope gives rise to a family of Calabi-Yau hypersurfaces with at worst conifold singularities. Using a criterion of Namikawa we found 30241 reflexive 4-polytopes such that the corresponding Calabi-Yau hypersurfaces are smoothable by a flat deformation. In particular, we found 210 reflexive 4-polytopes defining 68 topologically different Calabi--Yau 3-folds with $h_{11}=1$. We explain the mirror construction and compute several new Picard--Fuchs operators for the respective 1-parameter families of mirror Calabi-Yau 3-folds.

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