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Algebras of operators on Hilbert space, $C^*-$algebras, von Neumann algebras, non-commutative geometry

7 votes
2 answers
581 views

Conditional expectations onto masas in type III factors

There is always a (unique)normal condition expectation onto a masa in a type II_1 factor. When does a masa in a type III factor admit a normal conditional expectation? (If we drop normality, condition …
mohanravi's user avatar
  • 184
5 votes
1 answer
497 views

A question about automorphisms of $II_1$ factors

When one studies automorphisms of $II_1$ factors, one usually looks at the point norm topology - It is a well known result of Effros that if a $II_1$ factor $\mathcal{M}$ does not have property $\Gamm …
mohanravi's user avatar
  • 184