7R10. Nonlinear Hyperbolic Waves in Multi-Dimensions.Monographs and Surveys in Pure and Applied Mathematics, Vol 121.- P Prasad (Dept of Math, Indian Inst of Sci, Bangalore, India). Chapman and Hall/CRC, Boca Raton FL. 2001. 338 pp. ISBN 1-58488-072-4. \$89.95.

Reviewed by Shi Tsan Wu (Dept of Mech and Aerospace Eng, Univ of Alabama, Sparkman Dr, Huntsville AL 35899).

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.

This book consists of ten...