Hamada, Y.; Leray, J.; Wagschal, C. Systemes d’équations aux dérivées partielles à caractéristiques multiples: problème de Cauchy ramifie, hyperbolicite partielle. (French) Zbl 0307.35056 J. Math. pur. appl., IX. Sér. 55, 297-352 (1976). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 7 ReviewsCited in 44 Documents MSC: 35L30 Initial value problems for higher-order hyperbolic equations 35D10 Regularity of generalized solutions of PDE (MSC2000) PDF BibTeX XML Cite \textit{Y. Hamada} et al., J. Math. Pures Appl. (9) 55, 297--352 (1976; Zbl 0307.35056)