2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/53558Operator angle-action variables are studied in the frame of the SU(2) algebra, and their eigenstates and coherent states are discussed. The quantum mechanical addition of action-angle variables is shown to lead to a novel non commutative Hopf algebra. The group contraction is used to make the connection with the harmonic oscillator.6 pages,plain Latex,FTUV/93-12. Talk at the 'Harmonic Oscillators' Workshop,Maryland 1992High Energy Physics - Theorytext