Differential Calculus on a three-parameter oscillator algebra
  Two differential calculi are developped on an algebra generalizing the usual q-oscillator algebra and involving three generators and three parameters. They are shown to be invariant under the same quantum group that is extended to a ten-generator Hopf algebra. We discuss the special case where it reduces to a deformation of the invariance group of the Weyl-Heisenberg algebra for which we prove the existence of a constraint between the values of the parameters. 
M. Irac-Astaud (L.P.T.M. Univ.Denis Diderot, Paris)