Wavefronts And Rays As Characteristics And Asymptotics - Slawinski, Michael A (Memorial Univ, Canada) a Bona, Andrej (Curtin Univ, Australia)

Suitable for graduate students of physical sciences and engineering, this book provides a background of physics and mathematics for the concept of rays. It describes the theory of characteristics for different types of differential equations, the applications to wave propagation in different types of media, and the phenomena such as caustics.