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On a Notion of Exactness for Reduced Free Products of C*-Algebras

We will study some modifications to the notion of an exact C*-algebra by replacing the minimal tensor product with the reduced free product. First we will demonstrate how the reduced free product of a short exact sequence of C*-algebras with another C*-algebra may be taken. It will then be demonstrated that this operation preserves exact sequences. We will also establish that adjoining arbitrary k-tuples of operators in a free way behaves well with respect to taking ultrapowers.

preprint2012arXivOpen access
Paul Skoufranis
math.OA
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Paul Skoufranis

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