Equation 10.9.14E73B66195941

\begin{equation} -C_\eta r^{-2}\beta \leq \mathrm{dd}^{\mathrm{c}}\chi \leq C_\eta r^{-2}\beta ,\qquad C_\eta =\pi ^{-1}\bigl (\sup |\eta '|+t_1^2\sup |\eta ''|\bigr ), \end{equation}