Definition 1
Tag 00HY, permanent. Cite it as [Bourbaki, Tag 00HY].
Algebra, VIII, p. 279, § 15. Brauer Groups
The abelian group Br(K) is called the Brauer group of the field K.
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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