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math.OA2009★ 6 cited
Conditional expectations onto maximal abelian *-subalgebras
Charles A. Akemann, David Sherman
We determine when there is a unique conditional expectation from a semifinite von Neumann algebra onto a singly-generated maximal abelian *-subalgebra. Our work extends the results…
math.OA2002
The Spectral Scale and the Numerical Range
Charles A. Akemann, Joel Anderson
Suppose that c is an operator on a Hilbert Space H such that the von Neumann algebra N generated by c is finite. Suppose that tau is a faithful normal tracial state on N. Let B den…