5 papers
Strongly irreducible operators, -groups, and Jones indices in the hyperfinite type factor
Junsheng Fang, Chunlan Jiang, Minghui Ma +1
In this paper, we study the strong irreducibility of a class of operators associated with irrational rotation algebras in the hyperfinite type factor .…
Completely Bounded Representations Into Von Neumann Algebras And Connes Embedding Problem
Junsheng Fang, Chunlan Jiang, Liguang Wang +1
In this paper, we prove that if is a unital separable -algebra, is a von Neumann algebra which has the Kirchberg's quotient weak expectation proper…
A local quantization principle for inclusions of tracial von Neumann algebras
Xinyan Cao, Junsheng Fang, Chunlan Jiang +1
We study the local quantization principle (after Sorin Popa~\cite{popa 94} and \cite{popa 95}) of inclusions of tracial von Neumann algebras. Let be a type ${\rm…
The invariant subspace problem and Rosenblum operators I
Junsheng Fang, Bingzhe Hou, Chunlan Jiang +1
Let be an invertible operator. From the 1940's, Gelfand, Hille and Wermer investigated the invariant subspaces of by analyzing the growth of , wh…
Density of irreducible operators in the trace-class norm
Junsheng Fang, Chunlan Jiang, Minghui Ma +3
In 1968, Paul Halmos initiated the research on density of the set of irreducible operators on a separable Hilbert space. Through the research, a long-standing unsolved problem inqu…