Bourbaki

Theorem 2

Tag 03MZ, permanent. Cite it as [Bourbaki, Tag 03MZ].

Theory of Sets, chapter III, § 6. Infinite sets

For every infinite cardinal a\mathfrak{a} we have a2=a\mathfrak{a}^2 = \mathfrak{a}.

We shall use the following two lemmas :

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

Nothing.

Transcribed from the printed edition, 2004, Springer. Not translated.