FUNCTION: LieTools/SymTensor
USAGE: SymTensor(n,hfw,Gt); SymTensor(n,hfw); SymTensor(n,hfw,Gtype,rnk);
SYNOPSIS: SymTensor(n,hfw) computes the decomposition of an n-fold totally 
  symmetric tensor product of an irreducible finite-dimensional representation
  with highest weight hfw (expressed in terms of a basis of fundamental weights). 
  When called with just two arguments n and hfw, it is necessary to first initialize
  a global Lie algebra environment (see LieTools[gSetup]).
EXAMPLE: 
> SymTensor(2,[0,1],G2);

                    XX[0, 2] + XX[2, 0] + XX[0, 0]

SEE ALSO: LieTools[AltTensor], LieTools[MixedTensor], LieTools[TensorProduct]
