An union can be constituted-of-or-filled-with irreducible components.
Irreducible representation can be fundamental representation of a (lie group).
Powers can be constituted-of-or-filled-with irreducible polynomials.
A result can be for a restriction of irreducible unitary representation of compact groups.
Irreducible unitary representation can be constituted-of-or-filled-with compact groups.
Irreducible representation may pertain-to general linear groups.