\[\begin{bmatrix}w_{\mbox{\tiny I}}(\pi,\lambda)&w_{\mbox{\tiny II}}(\pi,\lambda%
)\\
w^{\prime}_{\mbox{\tiny I}}(\pi,\lambda)&w^{\prime}_{\mbox{\tiny II}}(\pi,%
\lambda)\end{bmatrix}=\begin{bmatrix}(-1)^{\nu}&0\\
0&(-1)^{\nu}\end{bmatrix}.\]