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arXiv 1202.6302math.GTmath.GR
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关于圆丛支配的三流形

On three-manifolds dominated by circle bundles

D. Kotschick, C. Neofytidis

摘要:

我们确定了哪些三流形是由乘积支配的。结果是,一个封闭的、定向的、连通的三流形被一个乘积支配当且仅当它被一个乘积或被两球面和圆的乘积的连通和覆盖。这个特征也可以用瑟斯顿几何或基本群的纯代数性质来表示。我们还确定了哪些三流形是由非平凡的圆丛支配的,以及哪些三流形群是由乘积表示的。

英文摘要:

We determine which three-manifolds are dominated by products. The result is that a closed, oriented, connected three-manifold is dominated by a product if and only if it is finitely covered either by a product or by a connected sum of copies of the product of the two-sphere and the circle. This characterization can also be formulated in terms of Thurston geometries, or in terms of purely algebraic properties of the fundamental group. We also determine which three-manifolds are dominated by non-trivial circle bundles, and which three-manifold groups are presentable by products.

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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