A Paley-Wiener Theorem for Periodic Scattering with Applications to the Korteweg-de Vries Equation

Details A Paley-Wiener Theorem for Periodic Scattering with Applications to the Korteweg-de Vries Equation A Paley-Wiener Theorem for Periodic Scattering with Applications to the Korteweg-de Vries Equation

2009-09-03

arxiv.org/abs/0909.0667v2

Zh. Mat. Fiz. Anal. Geom. 6:1, 21-33 (2010)

Nonlinear Sciences

Exactly Solvable and Integrable Systems

10 pages

Scientific paper

Consider a one-dimensional Schroedinger operator which is a short range perturbation of a finite-gap operator. We give necessary and sufficient conditions on the left, right reflection coefficient such that the difference of the potentials has finite support to the left, right, respectively. Moreover, we apply these results to show a unique continuation type result for solutions of the Korteweg-de Vries equation in this context. By virtue of the Miura transform an analogous result for the modified Korteweg-de Vries equation is also obtained.

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