Equation 18.26.7B3860123F073

\begin{equation} \begin{gathered} A_\pi =\int _{Y_\pi }\pi ^*\omega \wedge \eta _\pi ^{n-1},\\ \delta _\omega ^{\mathrm{pol}}(u,v) =\sup _{\pi \in \mathscr R} \frac{\| \mu _\pi (u)-\mu _\pi (v)\| _{\mathrm{TV}}}{A_\pi }. \end{gathered} \end{equation}