Hc. Yin et Qj. Qiu, INTERACTION OF TANGENT CONORMAL WAVES FOR HIGHER-ORDER NONLINEAR STRICTLY HYPERBOLIC-EQUATIONS, Science in China. Series A, Mathematics, Physics, Astronomy & Technological Sciences, 37(4), 1994, pp. 395-413
In this paper we deal with the interaction of three conormal waves for
a class of third-order nonlinear strictly hyperbolic equations, in wh
ich two conormal waves are tangent. By the same argument, we may also
discuss the similar problem for equation system of compressible fluid
flow and obtain similar conclusions.