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SMALL C*-ALGEBRAS THAT FAIL TO HAVE SEPARABLE REPRESENTATIONS
Authors:Saito  Kazuyuki
Institution:Mathematical Sciences, King's College, University of Aberdeen, Aberdeen AB24 3UE, Scotland
Abstract:It is shown that any {sigma}-finite, wild AW*-algebra of type II1 failsto have non-trivial separable representations. Here a wild AW*-algebrameans an AW*-algebra with no direct summand, which is *-isomorphicto a von Neumann algebra. Let A be the {sigma}-finite, wild type II1AW*-algebra formed by taking the monotone complete tensor productof the Dixmier algebra D and a factor M of type II1 acting ona separable Hilbert space. As both D and M act on separable Hilbertspaces, it seems natural to describe A as small and to ask thefollowing question. Does A have a non-trivial separable representation?The above described result answers negatively to this question.That is, A fails to have non-trivial separable representations.
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