Bourbaki

Remark 2

Tag 01AL, permanent. Cite it as [Bourbaki, Tag 01AL].

Lie Groups and Lie Algebras, chapter IX, § 2. Maximal tori of compact Lie groups

With the notations of Prop. 4, every closed subgroup H′H' of G containing H and such that (H′:H)(H': H) is finite normalizes H, and hence is contained in N; similarly, the normalizer of H′H' is contained in N. In particular, N is its own normalizer.

Bourbaki sets the proof directly after the statement, and the corpus does not separate them, so what is above is the statement and its proof together.

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Transcribed from the printed volume. Not translated.