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math.AT2011

Topological K-theory of the group C*-algebra of a semi-direct product Z^n rtimes Z/m for a free conjugation action

Martin Langer, Wolfgang Lueck

We compute the topological K-theory of the group C*-algebra C*_r(G) for a group extension Z^n->G->Z/m provided that the conjugation action of Z/m on Z^n is free outside the origin.