FUNCTION: LieTools/SgMkZeroWgtMonos
USAGE: SgMkZeroWgtMonos(n);
SYNOPSIS: SgMkZeroWgtMonos(n) will construct the zero weight monomials within
  the space of homogeneous polynomials on g of degree n.
CAVEATS: requires a previously initialized global Lie algebra environment.
  (See LieTools[gSetup].)
EXAMPLE: 
> with(LieTools):gSetup(A,2):
Setting up Gtype = A   rnk = 2
> SgMkZeroWgtMonos(2);

                                            2      2
      {g[2] g[7], g[3] g[6], g[1] g[8], g[5] , g[4] , g[4] g[5]}

SEE ALSO: LieTools[SgMkRepZeroWgtBasis]
