TORUS ACTIONS AND NON-NEGATIVE CURVATURE

TORUS ACTIONS AND NON-NEGATIVE CURVATURE
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环面作用和非负曲率

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发表时间:
2014
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通讯作者:
M. Wiemeler
M. Wiemeler
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文献类型:
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作者:
M. Wiemeler

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一个环面流形M是一个2n维可定向流形,它具有一个n维环面的有效作用,使得MT 6 ≠ 0。本文讨论了容许非负曲率不变度量的环面流形的分类。如果M是一个容许这样一个度量的环面流形,则M是一个自由线性环面作用在球面积上的商的同构。我们还合理的椭圆环面流形的有理同伦等价和同胚。
A torus manifold M is a 2n-dimensional orientable manifold with an effective action of an n-dimensional torus such that M T 6 ∅. In this paper we discuss the classification of torus manifolds which admit an invariant metric of non-negative curvature. If M is a torus manifold which admits such a metric, then M is diffeomorphic to a quotient of a free linear torus action on a product of spheres. We also classify rationally elliptic torus manifolds up to rational homotopy equivalence and homeomorphism.