22 research outputs found

    Long-Time Asymptotics for the Korteweg-de Vries Equation via Nonlinear Steepest Descent

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    We apply the method of nonlinear steepest descent to compute the long-time asymptotics of the Korteweg-de Vries equation for decaying initial data in the soliton and similarity region. This paper can be viewed as an expository introduction to this method.Comment: 31 page

    Wave Propagation near the Curved Surface of an Inhomogeneous Body

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    A trace formula for differential operators of arbitrary order

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    An operator H = H0 +V where H0 = i (N is arbitrary) and V is a differential operator of order N-1 with coefficients decaying sufficiently rapidly at infinity is considered in the space H2(R). The goal of the paper is to find an expression for the trace of the difference of the resolvents (H) -1 and (H0 - z) -1 in terms of the Wronskian of appropriate solutions to the differential equation Hu = zu. This also leads to a representation for the perturbation determinant of the pair H0H

    A Trace Formula for Differential Operators of Arbitrary Order

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