Remark 1
Tag 0ANL, permanent. Cite it as [Bourbaki, Tag 0ANL].
Lie Groups and Lie Algebras, chapter IV, § 2. Tits Systems
The above corollary shows that S is determined by (G, B, N); for this reason, we sometimes allow ourselves to say that (G, B, N) is a Tits system, or that (B, N) is a Tits system in G.
Bourbaki puts the proof directly after the statement, so what is above is the statement and its proof together.
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Cites
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