Vogan diagrams of real forms of affine Kac-Moody Lie algebras
A Vogan diagram for a real form of a Lie algebra is a Dynkin diagram with additional structure relating to the orbits of simple roots under the Cartan involution. The author's main result is that given an abstract Vogan diagram for a nontwisted affine Kac-Moody Lie algebra, there exists an almost compact real form of such an algebra such that the given diagram is the Vogan diagram of this almost compact real form.
scientific article; zbMATH DE number 1797464