Equation 12.9.14DA143DCFAFAB

\begin{equation} \sup _{Q/2}u\leq C_2\left(\fint _ Q u^{p_0}\right)^{1/p_0}, \qquad \inf _{Q/2}u\geq C_2^{-1} \left(\fint _ Q u^{-p_0}\right)^{-1/p_0}. \end{equation}