Equation 33.16.1.1 (0B2A)—The Stacks project

33.16.1.1

$\begin{equation} \label{varieties-equation-tangent-space} \vcenter { \xymatrix{ \mathop{\mathrm{Spec}}(\kappa (x)) \ar[r] \ar[dr] \ar@/^1pc/[rr] & \mathop{\mathrm{Spec}}(\kappa (x)[\epsilon ]) \ar@{.>}[r] \ar[d]& X \ar[d] \\ & \mathop{\mathrm{Spec}}(\kappa (s)) \ar[r] & S } } \end{equation}$

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