FUNCTION: LieTools/ZWMult
USAGE: ZWMult(hfw,Gt); ZWMult(hfw); ZWMult(hfw,Gtype,rnk);
SYNOPIS: ZWMult(hfw,Gt) returns the multiplicity of the zero weight in
  the finite-dimensional representation of Gt with highest weight hfw
  (expressed in terms of a basis of fundamental weights). When called 
  with a single argument hfw, it is necessary to first initialize a global
  Lie algebra environment (see LieTools[gSetup]).
EXAMPLE: 
> with(LieTools):
> ZWMult([1,1],A2);

                                  2

SEE ALSO: LieTools[WgtMult]
