For an abelian variety $A$ over a field $F$, the **geometric endomorphism algebra** of $A$ is the $\Q$-algebra $\End(A_{\overline{F}}) \otimes \Q$, where $\End(A_{\overline{F}})$ is the geometric endomorphism ring of $A$.

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- Last edited by John Voight on 2020-09-26 16:25:48

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