Examples of factors which have no Cartan subalgebras

preprint2014arXivOpen access

Abstract

We consider some conditions similar to Ozawa's condition (AO), and prove that if a non-injective factor satisfies such a condition and has the W*CBAP, then it has no Cartan subalgebras. As a corollary, we prove that II1\rm II_1 factors of universal orthogonal and unitary discrete quantum groups have no Cartan subalgebras. We also prove that continuous cores of type III1\rm III_1 factors with such a condition are semisolid as a II∞\rm II_\infty factor.

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