Corollary
Tag 01SX, permanent. Cite it as [Bourbaki, Tag 01SX].
Topologie algébrique, chapter II, § 2. Graphes
A maximal forest of a connected graph is a maximal tree in it.
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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Cites
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