Formula_7646

\[\left.\begin{array}{c}\frac{d \Psi}{d \lambda}=A(\lambda) \Psi, \\\lambda \in \mathbb{C}, \quad A(\lambda)=\sum_{v=1}^{n} \sum_{k=0}^{r_{v}} \frac{A_{v, k}}{\left(\lambda-a_{v}\right)^{k+1}}+\sum_{k=1}^{r_{\infty}} A_{\infty, k} \lambda^{k-1},\end{array}\right\}\]