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arXiv 1303.2138math.CO
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关于光滑Gorenstein多面体

On smooth Gorenstein polytopes

Benjamin Lorenz, Benjamin Nill

摘要:

一个指数为r的Gorenstein多面体是一个格多面体,其第r次扩张是一个自反多面体。这些对象是感兴趣的组合交换代数和枚举组合,并发挥了至关重要的作用,在Batyrev的和鲍里索夫的计算霍奇数的镜像对称通用卡-丘完全交叉。在本文中,我们报告什么是已知的光滑Gorenstein多面体,即,Gorenstein多面体,其法向扇是么模的。我们分类的d维光滑Gorenstein多面体的指数大于(d+3)/3。此外,我们使用修改Oebro的算法,以实现分类结果光滑Gorenstein多面体在低维。这些结果的第一个应用程序是一个数据库的所有复曲面法诺d倍,其anticanonical因子是整除的整数r大于d-8。作为第二个应用程序,我们验证了只有1000多个家庭的Calabi-Yau完全交叉的固定尺寸相关联的光滑Gorenstein多面体通过Batyrev-Borisov建设。

英文摘要:

A Gorenstein polytope of index r is a lattice polytope whose r-th dilate is a reflexive polytope. These objects are of interest in combinatorial commutative algebra and enumerative combinatorics, and play a crucial role in Batyrev's and Borisov's computation of Hodge numbers of mirror-symmetric generic Calabi-Yau complete intersections. In this paper, we report on what is known about smooth Gorenstein polytopes, i.e., Gorenstein polytopes whose normal fan is unimodular. We classify d-dimensional smooth Gorenstein polytopes with index larger than (d+3)/3. Moreover, we use a modification of Oebro's algorithm to achieve classification results for smooth Gorenstein polytopes in low dimensions. The first application of these results is a database of all toric Fano d-folds whose anticanonical divisor is divisible by an integer r larger than d-8. As a second application we verify that there are only finitely many families of Calabi-Yau complete intersections of fixed dimension that are associated to a smooth Gorenstein polytope via the Batyrev-Borisov construction.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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