Equation 13.26.4D190CC4FAB40

\begin{equation} c_\varepsilon ^ n\operatorname {vol}_\theta (p) \leq \operatorname {vol}_\eta (T^\rho _{\eta ,\varepsilon }(p)) \leq c_\varepsilon ^ n\operatorname {vol}_{\widehat\theta _\varepsilon }(p). \end{equation}