On a class of groups satisfying Bass' conjecture

In this paper, we use the Connes-Karoubi character liftings of the Hattori-Stallings rank in order to obtain examples of groups satisfying Bass' conjecture. We consider the nilpotence of the periodicity operator in cyclic homology and verify the conjecture for a certain class of groups which contains properly the ones studied by Eckmann. We also give an application of this method to the idempotent conjecture.