A quick proof on the equivalence classes of extended Vogan diagrams

Meng Kiat Chuah, Chu Chin Hu

Research output: Contribution to journalArticle

1 Citation (Scopus)


An extended Vogan diagram is an extended Dynkin diagram together with a diagram involution, such that the vertices fixed by the involution are colored white or black. Every extended Vogan diagram represents an almost compact real form of the affine Kac-Moody Lie algebra. Two extended diagrams are said to be equivalent if they represent isomorphic real forms. The equivalence classes of extended Vogan diagrams have earlier been classified by the authors. In this paper, we present a much shorter and instructive argument.

Original languageEnglish
Pages (from-to)824-827
Number of pages4
JournalJournal of Algebra
Issue number2
Publication statusPublished - 2007 Jul 15



  • Dynkin diagram
  • Extended Vogan diagram
  • Simple Lie algebra

ASJC Scopus subject areas

  • Algebra and Number Theory

Cite this