$\Newextarrow{\xhookrightarrow}{10,10}{0x21AA}$
5.33
\begin{equation} \begin{gathered}\label{equation:cartesian-in-direct-image-4} \xymatrix@R =50pt@C=50pt{ \operatorname{\mathcal{C}}'_0 \ar [d] \ar [r]^-{F_0 \circ \lambda _0} & \operatorname{\mathcal{D}}\ar [d]^{V} \\ \operatorname{\mathcal{C}}' \ar [r]^-{\overline{F} \circ \lambda } \ar@ {-->}[ur] & \operatorname{\mathcal{E}}. } \end{gathered} \end{equation}