Qin Wang

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math.FA2025

Geometric Banach property (T) for metric spaces via Banach representations of Roe algebras

Liang Guo, Qin Wang

In this paper, we introduce a notion of geometric Banach property (T) for metric spaces, which jointly generalizes Banach property (T) for groups and geometric property (T) for met…

math.FA2024

A nonstanadard analysis approach to limit operators and Fredholmness in Roe-like algebras

Liang Guo, Jin Qian, Qin Wang

Let $(X, d)$ be a uniformly locally finite metric space, and $T$ an operator in the uniform Roe algebra $C_{u}^{*} (X)$ (or uniform quasi-local algebra $C_{q l}^{*} (X)$ ). In this paper, we…