\begin{equation*}
    \exp\left(- B\sum_{k=1}^K \alpha_k \gamma(F_k)\right) = \prod_{k=1}^K \min\left(1, \left(\frac{P_{X\sim F_k}(X=-1)}{P_{X\sim F_k}(X=1)}\right)^{\alpha_k B}\right).
\end{equation*}
