Parenti, C.; Bernardi, E.; Bove, A. Propagation of \(C^{\infty}\)-singularities for a class of hyperbolic operators with double characteristics. (English) Zbl 0724.35063 Recent developments in hyperbolic equations, Proc. Conf., Pisa/Italy 1987, Pitman Res. Notes Math. Ser. 183, 255-264 (1988). [For the entire collection see Zbl 0713.00007.] We give an exterior estimate of the \(C^{\infty}\)-wave front set for the solutions of a class of hyperbolic (pseudo)-differential equations with double characteristic. Detailed proofs will appear. Cited in 1 Document MSC: 35L25 Higher-order hyperbolic equations 35B65 Smoothness and regularity of solutions to PDEs 35S05 Pseudodifferential operators as generalizations of partial differential operators Keywords:wave front set; double characteristic Citations:Zbl 0713.00007 PDFBibTeX XML