Kerodon

\begin{equation} \begin{gathered}\label{equation:exhibits-as-representable-version1} \xymatrix@R =50pt@C=50pt{ \operatorname{\mathcal{D}}\ar [r]^-{ \widetilde{G} } \ar [d] & \operatorname{Tw}( \operatorname{\mathcal{D}}_{-} ) \ar [d] \\ \operatorname{\mathcal{D}}^{\operatorname{op}}_{-} \times \operatorname{\mathcal{D}}_{+} \ar [r]^-{ \operatorname{id}\times G } & \operatorname{\mathcal{D}}_{-}^{\operatorname{op}} \times \operatorname{\mathcal{D}}_{-}. } \end{gathered} \end{equation}