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Abstract: In this paper we consider a semigroup of completely positive maps$\tau=\tau t,t \ge 0$ with a faithful normal invariant state $\phi$ on atype-$II 1$ factor $\cla 0$ and propose an index theory. We :achieve this via amore general Kolmogorovs type of construction for stationary Markov processeswhich naturally associate a nested isomorphic von-Neumann algebras. Inparticular this construction generalizes well known Jones constructionassociated with a sub-factor of type-II$ 1$ factor.



Autor: Anilesh Mohari

Fuente: https://arxiv.org/







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