\[\mathscr{C}_{\nu}\left(\sigma_{\nu}(t)\right)\sim\frac{(2/\nu)^{\frac{1}{3}}}{%
\pi N\left(-2^{\frac{1}{3}}\alpha^{\prime}\right)}\sum_{k=0}^{\infty}\frac{%
\beta^{\prime}_{k}}{\nu^{2k/3}},\]