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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