12 citations · 30 across the 16 of their papers we have counts for
6 papers · 1 filter
Bockstein operations and AD algebras with unbounded torsion in
Qingnan An, Zhichao Liu, Xin Ma
Eilers showed that for AD algebras of real rank zero with bounded torsion in , the coefficient transformations are redundant in the classification by ordered scal…
Boundary actions of CAT(0) spaces and their -algebras
Xin Ma, Daxun Wang
In this paper, we study boundary actions of CAT(0) spaces from a point of view of topological dynamics and -algebras. First, we investigate the actions of right-angled Coexter…
Fiberwise amenability of ample étale groupoids
Xin Ma
Let be a locally compact -compact Hausdorff ample groupoid on a compact space. In this paper, we further examine the (ubiquitous) fiberwise amenability introduced…
A categorical study on the generalized type semigroup
Xin Ma
In this short note, we show that the generalized type semigroup $\CW(X, Γ)$ introduced by the author in \cite{M3} belongs to the category \textnormal{W}. In particular, we demonstr…
Almost elementary étale groupoids
Xin Ma, Jianchao Wu
Motivated by Matui and Kerr's work on almost finiteness, we introduce a new finite approximation property for (possibly non-ample) étale groupoids called {almost elementariness}, w…
Purely infinite locally compact Hausdorff étale groupoids and their -algebras
Xin Ma
In this paper, we introduce properties including groupoid comparison, pure infiniteness and paradoxical comparison as well as a new algebraic tool called groupoid semigroup for loc…