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arXiv 2205.04584math.DG
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平坦解流形上的$G_2$ -结构

$G_2$-structures on flat solvmanifolds

Alejandro Tolcachier

摘要:

本文研究平坦解流形与$G_2$ -几何的关系。首先,我们利用$\mathsf{GL}(n,\mathbb{Z})$的有限子群的分类,对$n=5$和$n=6$给出了7维平坦可裂解流形的一个分类。然后,我们寻找封闭的,共闭的和发散的$G_2$ -结构兼容的平坦度量。特别是,我们提供了明确的例子紧平坦流形的挠自由的$G_2$ -结构,其有限完整性是循环的,并包含在$G_2$,和例子紧平坦流形承认一个发散自由的$G_2$ -结构。

英文摘要:

In this article we study the relation between flat solvmanifolds and $G_2$-geometry. First, we give a classification of 7-dimensional flat splittable solvmanifolds using the classification of finite subgroups of $\mathsf{GL}(n,\mathbb{Z})$ for $n=5$ and $n=6$. Then, we look for closed, coclosed and divergence-free $G_2$-structures compatible with the flat metric on them. In particular, we provide explicit examples of compact flat manifolds with a torsion-free $G_2$-structure whose finite holonomy is cyclic and contained in $G_2$, and examples of compact flat manifolds admitting a divergence-free $G_2$-structure.

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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