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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.FA2026
Multipliers of Beurling-Fourier algebras
Mahmood Alaghmandan, Olof Giselsson, Ebrahim Samei +1
For a locally compact group G we introduce and study the reduced Beurling-Fourier-Stieltjes algebra, a weighted analogue of the reduced Fourier-Stieltjes algebra, together with the…
math.OA2026
Jensen's inequality for partial traces in von Neumann algebras
Mizanur Rahaman, Lyudmila Turowska
Motivated by a recent result on finite-dimensional Hilbert spaces, we prove a Jensen's inequality for partial traces in semifinite von Neumann algebras. We also prove a similar ine…