activity
20072026
most citedA higher category approach to twisted actions on C*-algebras

38 citations · 223 across the 45 of their papers we have counts for

collaborators

53 papers

math.OA2026

Von Neumann algebras as reduced twisted groupoid -algebras

Alcides Buss, Luiz Felipe Garcia, Tomás Pacheco

We characterize the von Neumann algebras that are isomorphic, as -algebras, to reduced twisted -algebras of locally compact Hausdorff groupoids equipped with continuous H…

math.OA2026

On groupoids beyond partial actions, inner amenability, and models for Kirchberg algebras

Alcides Buss, Julian Kranz

We construct the first explicit examples of locally compact Hausdorff étale groupoids that are not inner amenable and that do not arise as transformation groupoids associated to pa…

math.OA2026

Dynamics in large scale geometry

Bruno de Mendonça Braga, Alcides Buss, Ruy Exel

We investigate the large scale geometry of certain metric spaces through the lens of dynamics. Our approach establishes a close connection between large scale dynamical phenomena a…

math.OA2026

Rapid decay and localizability for Fell bundles over etale Groupoids

Alcides Buss, Pradyut Karmakar

We introduce a notion of the Rapid Decay Property (RDP) for Fell bundles over locally compact Hausdorff étale groupoids, extending earlier rapid decay theories for étale groupoids…

math.OA2026

A universal property for groupoid C*-algebras. II. Fell bundles

Alcides Buss, Rohit Holkar, Ralf Meyer

We define possibly unsaturated, upper semicontinuous Fell bundles over Hausdorff, locally compact groupoids and establish a universal property for representations of their full sec…

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 proof…