Equation 5.2.8E58B935C99BA

\begin{equation} \beta =\frac{\mathrm{i}}2\sum _{j=1}^ n\mathrm{d}z_ j\wedge \mathrm{d}\bar z_ j, \qquad \frac{\beta ^ n}{n!}=\mathrm{d}V_{2n}. \end{equation}