 $$\begin{gathered}  \label{SL equation}  \begin{split} \frac0{{\mathbf{C_\kappa}}^{n-0}}\left(\Phi' {\mathbf{C_\kappa}}^{n-0}\right)' +\mu\Phi&=0 \text{ on }[-D/0,D/0],\\ \Phi'(\pm D/0 )&=0.    \end{split}\end{gathered}$$ 