Rank of a Lie group

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(real or complex)

The (real, respectively, complex) dimension of any Cartan subgroup of it. The rank of a Lie group coincides with the rank of its Lie algebra (see Rank of a Lie algebra). If a Lie group coincides with the set of real or complex points of a linear algebraic group , then the rank of coincides with the rank of (cf. Rank of an algebraic group).



[a1] R.W. Carter, "Simple groups of Lie type" , Wiley (Interscience) (1972) pp. Chapt. 1
[a2] V.S. Varadarajan, "Lie groups, Lie algebras, and their representations" , Prentice-Hall (1974)
[a3] A.W. Knapp, "Representation theory of semisimple groups" , Princeton Univ. Press (1986)
[a4] J.E. Humphreys, "Linear algebraic groups" , Springer (1975) pp. Sect. 35.1
How to Cite This Entry:
Rank of a Lie group. Encyclopedia of Mathematics. URL:
This article was adapted from an original article by V.L. Popov (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article