Das Energieintegral für nicht streng hyperbolische Operatoren. (Russian) Zbl 0315.35061
MSC:
35L30 | Initial value problems for higher-order hyperbolic equations |
35B45 | A priori estimates in context of PDEs |
35L30 | Initial value problems for higher-order hyperbolic equations |
35B45 | A priori estimates in context of PDEs |