Polynomial symmetries of spherical Lissajous systems
  In a previous work, both the constants of motion of a classical system and the symmetries of the corresponding quantum version have been computed with the help of factorizations. As their expressions were not polynomial, in this paper the question of finding an equivalent set of polynomial constants of motion and symmetries is addressed. The general algebraic relations as well as the appropriate Hermitian relations will also be found. 
J.A. Calzada, \c{S}. Kuru and J. Negro
math-ph math.MP