Definition 11.5.2 (074L)—The Stacks project

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Table of contents
Part 1: Preliminaries
Chapter 11: Brauer groups
Section 11.5: The Brauer group of a field
Definition 11.5.2 (cite)

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Definition 11.5.2. Let $k$ be a field. The Brauer group of $k$ is the abelian group of similarity classes of finite central simple $k$ -algebras defined above. Notation $\text{Br}(k)$ .

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