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Diffractive short pulse asymptotics for nonlinear wave equations. (English) Zbl 0947.35033

Summary: We present an algorithm for constructing approximate solutions to nonlinear wave propagation problems in which diffractive effects and nonlinear effects come into play on the same time scale. The approximate solutions describe the propagation of short pulses. In a separate paper the equations used to construct the approximate solutions are derived using the method of multiple scales and the approximate solutions are proved accurate in the short wavelength limit. We present numerical studies which even in the linear case indicate significant qualitative differences between these approximations and those derived using the slowly varying envelope ansatz.

MSC:

35C20 Asymptotic expansions of solutions to PDEs
78A60 Lasers, masers, optical bistability, nonlinear optics
35L70 Second-order nonlinear hyperbolic equations
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