Published online by Cambridge University Press: 17 April 2009
Let Δ be an affine building of type Ã2 and let Γ be a discrete group of type-rotating automorphisms acting simply transitively on the vertices of δ. We prove that the reduced group C*-algebra is simple. To prove this result we use the sufficient condition for the simplicity of
given in a recent paper by M. Bekka, M. Cowling and P. de la Harpe.