3 papers
math.OA2026
Fell bundles and Haagerup properties
Erik Bédos, Roberto Conti, Lyudmila Turowska
We introduce new properties of Haagerup-type for Fell bundles over discrete groups and discuss their relationship with Haagerup properties for the associated -algebras. In par…
math.OA2026
Actions of Fell bundles
Erik Bédos, Roberto Conti
We introduce and study actions of Fell bundles over discrete groups on Hilbert bundles. Many examples of such actions are presented. We discuss the connection with positive definit…
math.OA2025
Positive definiteness and Fell bundles over discrete groups
Erik Bédos, Roberto Conti
We introduce a natural concept of positive definiteness for bundle maps between Fell bundles over (possibly different) discrete groups and describe several examples. Such maps indu…