My question is based on the 1981 paper “Computation of wave fields in inhomogenous media” by Cerveny et.al. (I will add any appropriately needed information to this posted question, so there is no need to obtain the paper). They search for solutions to the wave equation $ $ \frac{\partial^2u}{\partial{x^2}} + \frac{\partial^2u}{\partial{z^2}} = \frac{1}{V(x,z)^2}\frac{\partial^2u}{\partial{t^2}}$ $ whereRead more