We give an alternative proof of a theorem of A. Connes that every unitary cocycle (relative to a modular automorphism of a weight _φ_0) is a Radon-Nikodym unitary cocycle (Dφ:_Dφ_0)t for some faithful normal semifinite weight φ.
Cite this article
Tetsuya Masuda, A Note on a Theorem of A. Connes on Radon-Nikodym Cocycles. Publ. Res. Inst. Math. Sci. 20 (1984), no. 1, pp. 131–136DOI 10.2977/PRIMS/1195181833