The Stacks project

Definition 94.8.1. Let $S$ be a scheme contained in $\mathit{Sch}_{fppf}$. A category fibred in groupoids $p : \mathcal{X} \to (\mathit{Sch}/S)_{fppf}$ is called representable by an algebraic space over $S$ if there exists an algebraic space $F$ over $S$ and an equivalence $j : \mathcal{X} \to \mathcal{S}_ F$ of categories over $(\mathit{Sch}/S)_{fppf}$.


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