2 papers
math.OA2026
B(H) is not a twisted groupoid C*-algebra
Alcides Buss, Luiz Felipe Garcia, Tomás Pacheco
We show that for an infinite dimensional Hilbert space cannot be realized as the reduced twisted -algebra of any locally compact Hausdorff étale groupoid. The proo…
math.OA2025
On weakly amenable groupoids
Tomás Pacheco
In this work, we study groupoids and their approximation properties, generalizing both the definitions and some known results for the group case. More precisely, we introduce weak…