\[\mathscr{L}\mskip-3.0muh\mskip 3.0mu\left(\zeta\right)\sim(-\ln\zeta)\sum_{k=0%
}^{\infty}\frac{\zeta^{k}}{k!}+\sum_{k=0}^{\infty}\psi\left(k+1\right)\frac{%
\zeta^{k}}{k!},\]