Equation 12.6.242DDABE7168CA

\begin{equation} \mathrm{dd}^{\mathrm{c}}\theta _ A=\frac1{4\pi ^2} \sum _{j,k}A_{jk}\, \mathrm d\alpha _ j\wedge \mathrm d\bar\alpha _ k\geq 0. \end{equation}