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@benblumsmith Probably not the optimal reference, but it is a special case of Lemma 9.6.4 in Quaternion Algebras: https://t.co/IZA8moJsrc
@benblumsmith Probably not the optimal reference, but it is a special case of Lemma 9.6.4 in Quaternion Algebras: https://t.co/IZA8moJsrc