$\Newextarrow{\xhookrightarrow}{10,10}{0x21AA}$
8.23
\begin{equation} \begin{gathered}\label{equation:all-cocart-inner} \xymatrix@R =50pt@C=50pt{ \Lambda ^{n}_{i} \ar [r]^-{f_0} \ar [d] & \operatorname{Cospan}^{\mathrm{all}, \widetilde{R}}( \operatorname{\mathcal{E}}) \ar [d] \\ \Delta ^ n \ar@ {-->}[ur] \ar [r]^-{ \overline{f} } & \operatorname{Cospan}^{\mathrm{all}, R}( \operatorname{\mathcal{C}}) } \end{gathered} \end{equation}