Equation 13.11.67E91D53462AC

\begin{equation} \left. \left(\bigwedge _{j=1}^ p \mathrm{dd}^{\mathrm{c}}\varphi _ j\right)\right|_{O}=\bigwedge _{j=1}^ p \mathrm{dd}^{\mathrm{c}}\varphi _ j|_{O}. \end{equation}