In this paper, we study representations of Sp(6,R) and SU(3) carried b
y homogeneous polynomials of phase-space variables in six dimensions.
These representations are very important for the study of symplectic i
ntegration techniques for Hamiltonian systems. We obtain irreducible r
epresentations for Sp(6,R) and SU(3) and explicit expressions for stat
es within SU(3) representations in terms of phase-space variables. (C)
1997 American Institute of Physics.