  Density matrix for N-qubit symmetric state or spin-j state (j = N/2) is
expressed in terms of the well known Fano statistical tensor parameters.
Employing the multiaxial representation [1], wherein a spin-j density matrix is
shown to be characterized by j(2j+1) axes and 2j real scalars, we enumerate the
number of invariants constructed out of these axes and scalars. These
invariants are explicitly calculated in the particular case of pure as well as
mixed spin-1 state.
