Journal of Lie Theory

no. 1
Cartan Decompositions and Semigroups of Simple Lie Groups
Rachida El Assoudi-Baikari1
1Laboratoire de Mathématiques, INSA de Rouen Normandie, 76801 Saint-Etienne-du-Rouvray, France
Journal of Lie Theory, Volume 28 (2018) no. 1, pp. 187-210
Let G be a split real connected simple Lie group and S a semigroup of G that contains a subgroup G(α) for an arbitrary root α, isomorphic to SL(2,R). We present a Cartan decomposition of the Lie algebra of G, related to α, invariant by the adjoint action of the Lie algebra sl(2,R) that allows to characterize some properties of the Lie saturate of the semigroup S. We give necessary and sufficient conditions for S to be equal to the whole group G.
DOI: 10.5802/jolt.999
Classification: 22E46, 17B22, 93B05
Keywords: Semi-simple Lie groups, root systems, controllability

Rachida El Assoudi-Baikari  1

1 Laboratoire de Mathématiques, INSA de Rouen Normandie, 76801 Saint-Etienne-du-Rouvray, France 
Rachida El Assoudi-Baikari. Cartan Decompositions and Semigroups of Simple Lie Groups. Journal of Lie Theory, Volume 28 (2018) no. 1, pp. 187-210. doi: 10.5802/jolt.999
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     title = {Cartan {Decompositions} and {Semigroups} of {Simple} {Lie} {Groups}},
     journal = {Journal of Lie Theory},
     pages = {187--210},
     year = {2018},
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     doi = {10.5802/jolt.999},
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