Jy. Thibon et al., SYMMETRIZED SQUARES AND CUBES OF THE FUNDAMENTAL UNIRREPS OF SP(2N,R), Journal of physics. A, mathematical and general, 31(3), 1998, pp. 1073-1086
We establish the complete decompositions of the symmetrized Kronecker
squares of the basic harmonic representations of Sp(2n,R) conjectured
by Grudzinski and Wybourne (Grudzinski K and Wybourne B G 1996 J. Phys
. A: Math. Gen. 29 6631-41) and give analogous complete results for th
e symmetrized cubes. Equivalence relationships are shown to exist betw
een certain pairs of plethysms.