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arXiv math/0405235math.GTmath.DG
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关于空间$\mathcal{R}^+(M)$的同伦型

On the homotopy type of the space $\mathcal{R}^+(M)$

Vladislav Chernysh

摘要:

我们证明了流形上正数量曲率度量空间在非空时同伦等价于正数量曲率度量空间,该度量空间限制于余维大于或等于3的给定子流形附近的固定度量。我们的主要工具是Gromov-Lawson构造的参数化版本,该构造用于证明流形上正数量曲率度量的存在性在余维大于或等于3的手术下是不变的。

英文摘要:

we show that the space of metrics of positive scalar curvature on a manifold is, when nonempty, homotopy equivalent to a space of metrics of positive scalar curvature that restrict to a fixed metric near a given submanifold of codimension greater or equal than 3. Our main tool is a parameterized version of the Gromov-Lawson construction, which was used to show that the existence of a metric of positive scalar curvature on a manifold was invariant under surgeries in codimension greater or equal than 3.

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