Equation 10.9.17503A52143DA

\begin{equation} \bigwedge _{l=1}^ k\mathrm{dd}^{\mathrm{c}}(v_ l+g_ l)=\sum _{I\subset \{ 1,\ldots ,k\} }\Bigl (\bigwedge _{l\in I}\mathrm{dd}^{\mathrm{c}}v_ l\Bigr )\wedge \bigwedge _{l\notin I}\mathrm{dd}^{\mathrm{c}}g_ l, \end{equation}