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Crossed Products and MF algebras

Published 19 Jan 2013 in math.OA | (1301.4585v1)

Abstract: We prove that the crossed product AxG of a unital finitely generated MF algebra A by a discrete finitely generated amenable residually finite group G is an MF algebra, provided that the action is almost periodic. This generalizes a result of Hadwin and Shen. We also construct two examples of crossed product C*-algebras whose BDF Ext semigroups are not groups.

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Authors (2)

  1. Weihua Li 
  2. Stefanos Orfanos 

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