Theorems about algebras | Lie algebras | Representation theory

Theorem of the highest weight

In representation theory, a branch of mathematics, the theorem of the highest weight classifies the irreducible representations of a complex semisimple Lie algebra . There is a closely related theorem classifying the irreducible representations of a connected compact Lie group . The theorem states that there is a bijection from the set of "dominant integral elements" to the set of equivalence classes of irreducible representations of or . The difference between the two results is in the precise notion of "integral" in the definition of a dominant integral element. If is simply connected, this distinction disappears. The theorem was originally proved by Élie Cartan in his 1913 paper. The version of the theorem for a compact Lie group is due to Hermann Weyl. The theorem is one of the key pieces of representation theory of semisimple Lie algebras. (Wikipedia).

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Related pages

Weyl character formula | Borel–Weil–Bott theorem | Hermann Weyl | Peter–Weyl theorem | Invariant theory | Root system | Élie Cartan | Representation theory of semisimple Lie algebras | Maximal torus | Verma module | Cartan subalgebra | Lie algebra representation | Weight (representation theory) | Semisimple Lie algebra | Representation theory | Compact group