Super-expanders and warped cones
نویسندگان
چکیده
For a Banach space $X$, we show that any family of graphs quasi-isometric to levels warped cone $\mathcal O_\Gamma Y$ is an expander with respect $X$ if and only the induced $\Gamma$-representation on $L^2(Y;X)$ has spectral gap. This provides examples are all spaces non-trivial type.
منابع مشابه
Warped cones and property A
We describe a construction (the ‘warped cone construction’) which produces examples of coarse spaces with large groups of translations. We show that by this construction we can obtain many examples of coarse spaces which do not have property A or which are not uniformly embeddable into Hilbert space. AMS Classification numbers Primary: 53C20 Secondary: 43A07, 53C12, 20F69
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ژورنال
عنوان ژورنال: Annales de l'Institut Fourier
سال: 2021
ISSN: ['0373-0956', '1777-5310']
DOI: https://doi.org/10.5802/aif.3373