Corollary
Tag 0A7W, permanent. Cite it as [Bourbaki, Tag 0A7W].
Lie Groups and Lie Algebras, chapter III, § 1. Lie groups
Let G be a Lie group and H and L normal Lie subgroups of G with L ⊂ H. Then H/L is a normal Lie subgroup of G/L and the canonical bijection of G/H onto (G/L)/(H/L) is a Lie group isomorphism.
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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