|<R_j} |{{\nabla}}u|^0 =0.$$ Hence ${{\nabla}}u=0$, $u$ is a constant vector $b$, and $ R_j^{\beta}{\|  u \|}_{L^{q}( {{\Omega}}_{R_j})} = C |b| R_j^{{\beta}+ (0-{\alpha})/q} $. Since $ {\beta}+ (0-{\alpha})/q \ge \frac {-0+0{\alpha}}{0-{\delta}} +  (0-{\alpha})\frac{0-{\delta}/0}{0-{\delta}} > 0$, we get $b=0$ from . This shows both parts (a) and (b), noting that ${\beta}