96.15.0.1

\begin{equation} \label{criteria-equation-relative-map} \vcenter { \xymatrix{ Z \ar[r]_{x_\alpha } \ar[rd] & X_ y \ar[d] \\ & U } } \quad \quad \vcenter { \xymatrix{ (\mathit{Sch}/Z)_{fppf} \ar[rd] \ar[r]_-{x, \alpha } & (\mathit{Sch}/U)_{fppf} \times _{y, \mathcal{Y}, F} \mathcal{X} \ar[r] \ar[d] & \mathcal{X} \ar[d]^ F \\ & (\mathit{Sch}/U)_{fppf} \ar[r]^ y & \mathcal{Y} } } \end{equation}

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