Approximating L^2 invariants of amenable covering spaces: A heat kernel approach
Approximating L^2 invariants of amenable covering spaces: A heat kernel approach
复制标题
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:
影响因子:
--
通讯作者:
V. Mathai
中科院分区:
文献类型:
--
作者:
J. Dodziuk;V. Mathai
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.