2 papers
math.OA2025
Fibring structures of ideals in Roe algebras and their -theories
Zhijie Wang, Benyin Fu, Jiawen Zhang
In this paper, we investigate the ideal structure of Roe algebras for metric spaces beyond the scope of Yu's property A. Using the tool of rank distributions, we establish fibring…
math.OA2025
Asymptotic expansion for groupoids and Roe type algebras
Xulong Lu, Qin Wang, Jiawen Zhang
In this paper, we introduce a notion of expansion for groupoids, which recovers the classical notion of expander graphs by a family of pair groupoids and expanding actions in measu…