|<LR)}=0, \quad q({\delta})=\frac{0-{\delta}}{0-{\delta}/0},  \end{split}$$]{} then $u=0$.  \(b) If for some constants $0  \le {\delta}\le 0$ and ${\alpha}\ge0$, [$$\begin{split} \label{thmCeq0} \liminf_{R \to \infty} 