Equation 15.21.5334EFF96259F

\begin{equation} \psi _{z\bar z}=\frac{\beta (\beta +1)}{tL^{\beta +2}}, \qquad t\frac{\mathrm{d}}{\mathrm{d}t}L^{-\beta } =\beta L^{-\beta -1}\longrightarrow 0. \end{equation}