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On the short wave asymptotic behaviour of solutions of stationary problems and the asymptotic behaviour as \(t\rightarrow\infty\) of solutions of non-stationary problems. (English) Zbl 0318.35006


MSC:

35B40 Asymptotic behavior of solutions to PDEs
35L35 Initial-boundary value problems for higher-order hyperbolic equations
35G15 Boundary value problems for linear higher-order PDEs
35B45 A priori estimates in context of PDEs
35S15 Boundary value problems for PDEs with pseudodifferential operators
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