\begin{equation}
    (\nu_l \Gamma_l)(p, t -\delta t \rightarrow t)= -\frac{1}{\delta t}\sum_{t-\delta t<t_i<t}
    \frac{\delta V(p,t_i)}{V_p(t_i)}\cdot \mathbb{1}_{\{\delta V(p,t_i)<0\}},
    \label{eq:estim_gamma_l}
\end{equation}
