Approximating L^2 invariants of amenable covering spaces: A heat kernel approach

Approximating L^2 invariants of amenable covering spaces: A heat kernel approach
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近似适合覆盖空间的 L^2 不变量:热核方法

DOI:
10.1090/conm/211/02818
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发表时间:
1996
期刊:
arXiv: Differential Geometry
影响因子:
--
通讯作者:
V. Mathai
V. Mathai
中科院分区:
--
文献类型:
--
作者:
J. Dodziuk;V. Mathai

文献摘要

被引文献

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在本文中,我们证明在某些假设下,合适的覆盖空间的 L^2 Betti 数可以通过常规穷举的平均 Betti 数来近似。我们还证明了一些 L^2 谱不变量可以通过常规穷举的相应平均谱不变量来近似。对于与边界值问题相关的热核,所使用的主要工具是“感觉不到边界原理”(M. Kac 提出)的概括。
In this paper, we prove that the L^2 Betti numbers of an amenable covering space can be approximated by the average Betti numbers of a regular exhaustion, under some hypotheses. We also prove that some L^2 spectral invariants can be approximated by the corresponding average spectral invariants of a regular exhaustion. The main tool which is used is a generalisation of the "principle of not feeling the boundary" (due to M. Kac), for heat kernels associated to boundary value problems.