4 papers
Factor systems and geometric structures of strongly graded rings
Joakim Arnlind, Stefan Wagner
Graded rings provide a natural algebraic framework for encoding symmetry via decompositions into homogeneous components indexed by a group, together with multiplication rules refle…
Noncommutative principal bundles and central extensions
Stefan Wagner
Motivated by the classical theory of spin structures, we develop a theory for lifting free C-dynamical systems, a.k.a. noncommutative principal bundles, along central extension…
Weak Centrality of unital C(X)-algebras
Bharat Talwar, Prahlad Vaidyanathan, Stefan Wagner
This paper establishes a fibrewise characterization of weak centrality for unital -algebras whose defining homomorphism maps onto the center: such an algebra is weakly…
Saturated Fell bundles and their classification
Natã Machado, Stefan Wagner
We present a comprehensive classification theory for saturated Fell bundles over locally compact groups, utilizing data associated with their base group and unit fiber. This framew…