This is an optional argument for the schurRing and symmetricRing functions. When the exterior or symmetric powers of a symmetric function g are computed, the result depends on whether g is interpreted as a virtual representation of a general linear or symmetric group. The option GroupActing specifies the interpretation to be considered. Its possible values are "GL" and "Sn", with the former being the default.




The first example computes the decomposition of \Lambda^3(Sym^2(V)) into irreducible GL(V)representations, while the second one computes the second symmetric power of the sign representation of the symmetric group S_2.
The object GroupActing is a symbol.