An invariant Γ for an automorphism group of a factor given by Connes is generalized to a general von Neumann algebra and the relation between Γ and a characterization of an inner automorphism group of a von Neumann algebra due to Borchers are discussed.
Cite this article
Akio Ikunishi, Yoshiomi Nakagami, On Invariants <i>G</i>(σ) and Γ(σ) for an Automorphism Group of a von Neumann Algebra. Publ. Res. Inst. Math. Sci. 12 (1976), no. 1, pp. 1–30DOI 10.2977/PRIMS/1195190956