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单词 CartanSubalgebra
释义

Cartan subalgebra


Let 𝔤 be a Lie algebraMathworldPlanetmath. Then a Cartan subalgebraMathworldPlanetmath is a maximal subalgebraMathworldPlanetmath of 𝔤 which is self-normalizing, that is, if [g,h]𝔥 for all h𝔥, then g𝔥 as well. Any Cartan subalgebra 𝔥 is nilpotentPlanetmathPlanetmathPlanetmathPlanetmath, and if 𝔤 is semi-simplePlanetmathPlanetmath, it is abelianMathworldPlanetmath. All Cartan subalgebras of a Lie algebra are conjugate by the adjoint action of any Lie group with algebra 𝔤.

The dimension of 𝔥 is called the rank of 𝔤.

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更新时间:2025/5/4 6:34:05