Ari, Nasit; Gorman, Arthur D. Time-evolution of a caustic. (English) Zbl 0694.35103 Int. J. Math. Math. Sci. 11, No. 4, 805-810 (1988). Summary: The Lagrange manifold formalism is adapted to study the time-evolution of caustics associated with high frequency wave propagation in media with both spatial and temporal inhomogeneities. Cited in 1 Document MSC: 35L10 Second-order hyperbolic equations 35B40 Asymptotic behavior of solutions to PDEs 34E20 Singular perturbations, turning point theory, WKB methods for ordinary differential equations Keywords:turning points; Lagrange manifold; caustics; wave propagation PDFBibTeX XMLCite \textit{N. Ari} and \textit{A. D. Gorman}, Int. J. Math. Math. Sci. 11, No. 4, 805--810 (1988; Zbl 0694.35103) Full Text: DOI EuDML