Nonlinear Hyperbolic Waves in Multidimensions

In this book, the authors have discussed the propagation of a curved nonlinear wavefront for the ordinary fluid dynamics(ie without considering magneto-fluids) according to two fundamental physical processes:i) at different points of the wavefront,it travels with different speeds depending on the local amplitude leading to a longitudinal stretching of rays; and ii) a lateral deviation of rays is produced due to non-uniform distribution of the amplitude of the wave front.