$\Newextarrow{\xhookrightarrow}{10,10}{0x21AA}$
9.3
\begin{equation} \begin{gathered}\label{proposition:w-local-pushout} \xymatrix@C =50pt@R=50pt{ X \ar [d]^{w} \ar [r] & X' \ar [d]^{w'} \\ Y \ar [r] & Y'. } \end{gathered} \end{equation}