Prefer a chat interface with context about you and your work?
Outer actions of a discrete amenable group on approximately finite dimensional factors. I. General theory
To each factor M, we associate an invariant Ob m (M) to be called the intrinsic modular obstruction as a cohomological invariant which lives in the "third" cohomology group:where {C, R, θ} is the flow of weights on M. If α is an outer action of a countable discrete group …