Equation 10.22.3F205E7AE4ECC

\begin{equation} \begin{aligned} m(s)^ n& =n\int _0^ s t^{n-1}D(t)\, \mathrm{d} t,\qquad m(s)=sU'(s),\\ m'(s)& =\frac{s^{n-1}D(s)}{m(s)^{n-1}}>0. \end{aligned} \end{equation}