Formula_21831

\[\begin{gathered}\frac{\partial}{\partial t} f(t, q, p)=-\frac{p}{m} \frac{\partial}{\partial t} f(t, q, p)- \\-\frac{\partial}{\partial p} f(t, q, p) \int_{\mathbb{R}^{v} \times \mathbb{R}^{v}} d q_{1} d p_{1} \frac{\partial}{\partial q} U\left(q-q_{1}\right) f\left(t, q_{1}, p_{1}\right),\end{gathered}\]