Solution
= Solution
For $3\pi/2<2\alpha<2\pi$, $1/2<\lambda_0<2/3$ and $3/2<\lambda_1<2$, whereas $\lambda_2>5/2$. Hence \b[both of the first two harmonic modes precede the $r^2$ particular term] in the corner expansion; the first still dominates as $r\to0$. The first-mode gradient is singular. These are reentrant wedges, and the global arc condition determines the important homogeneous coefficients.