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arxiv: 1209.1728 · v3 · pith:NNMASJINnew · submitted 2012-09-08 · 🧮 math.OA

Examples of factors which have no Cartan subalgebras

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keywords cartanconditionfactorsprovesubalgebrasfactorcbapconditions
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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 $\rm II_1$ factors of universal orthogonal and unitary discrete quantum groups have no Cartan subalgebras. We also prove that continuous cores of type $\rm III_1$ factors with such a condition are semisolid as a $\rm II_\infty$ factor.

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