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arXiv 2003.09843math.DGmath.SP
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具有基本中曲率纤维的黎曼浸没的谱估计

Spectral estimates for Riemannian submersions with fibers of basic mean curvature

Panagiotis Polymerakis

摘要:

对于具有基本中曲率纤维的黎曼浸没,我们比较了全空间的谱与基流形上薛定谔算子的谱。利用这一概念,我们研究浸没所产生的行动的李群。在这种情况下,我们扩展了最先进的结果底部的频谱下黎曼覆盖。作为应用,我们计算了连通顺从李群的谱底和Cheeger常数。

英文摘要:

For Riemannian submersions with fibers of basic mean curvature, we compare the spectrum of the total space with the spectrum of a Schrödinger operator on the base manifold. Exploiting this concept, we study submersions arising from actions of Lie groups. In this context, we extend the state of the art results on the bottom of the spectrum under Riemannian coverings. As an application, we compute the bottom of the spectrum and the Cheeger constant of connected, amenable Lie groups.

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