Example 2
Tag 03SY, permanent. Cite it as [Bourbaki, Tag 03SY].
Theory of Sets, chapter III, § 2. Well-ordered sets
Every subset (in particular, the empty subset) of a well-ordered set is well-ordered by the induced ordering.
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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