Fig. 3
From: A theoretical study of serrated leading edges in aerofoil and vortical gust interaction noise
Sketch of the Argand diagram of the two half-planes R± and the overlapped strip. Two branch cuts joining the branch points \(b_{0}^{\pm }\) to ±∞ through the corresponding two half-planes. The integral path would move back to the horizontal axis [22] except for a slight distortion around the origin to avoid any possible singular point