16 citations · 125 across the 34 of their papers we have counts for
5 papers · 1 filter
Bundles of C*-algebras and the KK(X;-,-)-bifunctor
Ezio Vasselli
An overview about C*-algebra bundles with a Z-grading is presented, with particular emphasis on classification questions. In particular, we discuss the role of the representable KK…
Extension of automorphisms to C*-crossed products with non-trivial centre
Roberto Conti, Ezio Vasselli
Given a quasi-special endomorphism of a C*-algebra A with nontrivial center, we study an extension problem for automorphisms of A to a minimal cross-product B of A by . Expl…
A theory of bundles over posets
John E. Roberts, Giuseppe Ruzzi, Ezio Vasselli
In algebraic quantum field theory the spacetime manifold is replaced by a suitable base for its topology ordered under inclusion. We explain how certain topological invariants of t…
Gauge-equivariant Hilbert bimodules and crossed products by endomorphisms
Ezio Vasselli
C*-endomorphisms arising from superselection structures with non-trivial centre define a 'rank' and a 'first Chern class'. Crossed products by such endomorphisms involve the Cuntz-…
Realization of minimal C*-dynamical systems in terms of Cuntz-Pimsner algebras
Fernando Lledó, Ezio Vasselli
In the present paper we study tensor C*-categories with non-simple unit realised as C*-dynamical systems (F,G,β) with a compact (non-Abelian) group G and fixed point algebra A := F…