Initial boundary value problems of fourth order hyperbolic equations. (English) Zbl 0432.35052
MSC:
35L30 | Initial value problems for higher-order hyperbolic equations |
35L35 | Initial-boundary value problems for higher-order hyperbolic equations |
31A30 | Biharmonic, polyharmonic functions and equations, Poisson’s equation in two dimensions |
31A35 | Connections of harmonic functions with differential equations in two dimensions |