2 papers
math.OA2010
On Reduced Amalgamated Free Products of C*-algebras and the MF-Property
Jonas Andersen Seebach
We establish the MF property of the reduced group -algebra of an amalgamated free product of countable Abelian discrete groups. This result is then used to give a characteri…
math.OA2009
Extensions of the reduced group C*-algebra of a free product of amenable groups
Jonas Andersen Seebach, Klaus Thomsen
We prove that the unitary equivalence classes of extensions of C*_r(G) by any sigma-unital stable C"-algebra, taken modulo extensions which split via an asymptotic homomorphism, fo…