Brauer group
(chiefly historical) In certain (especially Nazi) racial theories, someone of mixed race, especially one who is partly of Jewish descent.
Not played on a harp. / Not accompanied by the music of a harp.
(mathematics) For a field K, an abelian group whose elements are Morita equivalence classes of central simple algebras over K, with addition given by the tensor product of algebras.
(grammar) An adjective that modifies the head of a noun phrase in which it occurs.
体K上の二つの中心単純代数がモリタ同値かどうかを判定するために、数学者はそれらのクラスを、体K上の中心単純代数のモリタ同値類からなるアーベル群（和は代数のテンソル積で与えられる）で比較する。
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