Equation 13.11.7A1F77BA03A26

\begin{equation} \mathrm{dd}^{\mathrm{c}}(a\varphi _1+b\psi _1)\wedge \bigwedge _{j=2}^ p \mathrm{dd}^{\mathrm{c}}\varphi _ j =a\, \mathrm{dd}^{\mathrm{c}}\varphi _1\wedge \bigwedge _{j=2}^ p \mathrm{dd}^{\mathrm{c}}\varphi _ j + b\, \mathrm{dd}^{\mathrm{c}}\psi _1\wedge \bigwedge _{j=2}^ p \mathrm{dd}^{\mathrm{c}}\varphi _ j \end{equation}