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On the Independence of K-Theory and Stable Rank for Simple C*-Algebras

  • Andrew Toms
Published/Copyright: July 27, 2005
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Journal für die reine und angewandte Mathematik
From the journal Volume 2005 Issue 578

Abstract

Jiang and Su and (independently) Elliott discovered a simple, nuclear, infinite-dimensional C*-algebra ℒ̵ having the same Elliott invariant as the complex numbers. For a nuclear C*-algebra A with weakly unperforated K*-group the Elliott invariant of A ⊗ ℒ̵ is isomorphic to that of A. Thus, any simple nuclear C*-algebra A having a weakly unperforated K*-group which does not absorb ℒ̵ provides a counterexample to Elliott's conjecture that the simple nuclear C*-algebras will be classified by the Elliott invariant. In the sequel we exhibit a separable, infinite-dimensional, stably finite instance of such a non-ℒ̵-absorbing algebra A, and so provide a counterexample to the Elliott conjecture for the class of simple, nuclear, infinite-dimensional, stably finite, separable C*-algebras.

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Published Online: 2005-07-27
Published in Print: 2005-01-01

© Walter de Gruyter

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