Cuntz-Krieger algebras and endomorphisms of finite direct sums of type I_{∞} factors

Brenken, Berndt

doi:10.1090/S0002-9947-01-02713-1

Cuntz-Krieger algebras and endomorphisms of finite direct sums of type I$_{\infty }$ factors
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Trans. Amer. Math. Soc. 353 (2001), 3835-3873 Request permission

Abstract:

A correspondence between algebra endomorphisms of a finite sum of copies of the algebra of all bounded operators on a Hilbert space and representations of certain norm closed $\ast$-subalgebras of bounded operators generated by a finite collection of partial isometries is introduced. Basic properties of this correspondence are investigated after developing some operations on bipartite graphs that usefully describe aspects of this relationship.

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