Equation 12.12.13B788E18394E

\begin{equation} \begin{gathered} I_ B=\int _ XB\wedge \kappa _0^{n-1},\qquad U_\mu =\frac{V_0+I_ B}{D_\mu (\kappa _0)},\\ \Delta _\mu (B)=V_0^{-(n-1)/n}\int _ XB\wedge \gamma _0^{n-1}. \end{gathered} \end{equation}