arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0904.0174math.DG
收藏

闭流形上黎曼流形的度量几何

The Metric Geometry of the Manifold of Riemannian Metrics over a Closed Manifold

Brian Clarke

摘要:

证明了有限维固定闭流形上的光滑黎曼度量的流形上的L^2黎曼度量诱导出一个度量空间结构。由于L^2度量是一个弱黎曼度量,这一事实不能从一般结果中得出。此外,我们还证明了Hilbert/Frechet流形上弱黎曼度量的指数映射和距离函数的几个结果.这些陈述类似于有限维流形上的黎曼度量或希尔伯特流形上的强黎曼度量的情况,但比它们弱。

英文摘要:

We prove that the L^2 Riemannian metric on the manifold of all smooth Riemannian metrics on a fixed closed, finite-dimensional manifold induces a metric space structure. As the L^2 metric is a weak Riemannian metric, this fact does not follow from general results. In addition, we prove several results on the exponential mapping and distance function of a weak Riemannian metric on a Hilbert/Frechet manifold. The statements are analogous to, but weaker than, what is known in the case of a Riemannian metric on a finite-dimensional manifold or a strong Riemannian metric on a Hilbert manifold.

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。

↑