A Kurosh-Type Theorem for Type III Factors

Details A Kurosh-Type Theorem for Type III Factors A Kurosh-Type Theorem for Type III Factors

2008-09-20

arxiv.org/abs/0809.3488v1

Mathematics

Operator Algebras

7 pages

Scientific paper

We prove a generalization of N. Ozawa's Kurosh-type theorem to the setting of free products of semiexact II_1 factors with respect to arbitrary (non-tracial) faithful normal states. We are thus able to distinguish certain resulting type III factors. For example, if M = LF_n \otimes LF_m and {\phi_i} is any sequence of faithful normal states on M, then the l-various (M,\phi_1) * ... * (M,\phi_l) are all mutually non-isomorphic.

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