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Quasi-classical asymptotics of solutions to the matrix factorization problem with quadratically oscillating off-diagonal elements

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Abstract

The paper investigates the asymptotic behavior of solutions to the 2 × 2 matrix factorization (Riemann-Hilbert) problem with rapidly oscillating off-diagonal elements and quadratic phase function. A new approach to study such problems based on the ideas of the stationary phase method and M. G. Krein’s theory is proposed. The problem is model for investigating the asymptotic behavior of solutions to factorization problems with several turning points. Power-order complete asymptotic expansions for solutions to the problem under consideration are found. These asymptotics are used to construct asymptotics for solutions to the Cauchy problem for the nonlinear Schrödinger equation at large times.

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Correspondence to A. M. Budylin.

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Translated from Funktsional’ nyi Analiz i Ego Prilozheniya, Vol. 48, No. 1, pp. 1–18, 2014

Original Russian Text Copyright © by A. M. Budylin and V. S. Buslaev

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Budylin, A.M., Buslaev, V.S. Quasi-classical asymptotics of solutions to the matrix factorization problem with quadratically oscillating off-diagonal elements. Funct Anal Its Appl 48, 1–14 (2014). https://doi.org/10.1007/s10688-014-0041-4

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  • DOI: https://doi.org/10.1007/s10688-014-0041-4

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