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arXiv 1111.4733nlin.SI
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格点势KdV方程的逆散射变换

An Inverse Scattering Transform for the Lattice Potential KdV Equation

Samuel Butler, Nalini Joshi

摘要:

格点势Korteweg-de Vries方程(LKdV)是一个两个独立变量的偏差分方程,它具有许多类似于著名的Korteweg-de Vries方程的性质。这些包括离散孤子解,Backlund变换和相关的线性问题,称为拉克斯对,它提供了兼容性条件。在本文中,我们解决了LKdV方程的初始值问题,通过离散实施的逆散射变换方法适用于拉克斯对。用于LKdV方程的初始值被假定为实数,并且随着离散空间变量的绝对值接近大值而衰减到零。我们的方法的一个有趣的特点是离散的Gel'fand-Levitan方程的解决方案。此外,我们提供了一个完整的表征无反射的潜力,并表明,这导致柯西矩阵形式的N-孤子解决方案。

英文摘要:

The lattice potential Korteweg-de Vries equation (LKdV) is a partial difference equation in two independent variables, which possesses many properties that are analogous to those of the celebrated Korteweg-de Vries equation. These include discrete soliton solutions, Backlund transformations and an associated linear problem, called a Lax pair, for which it provides the compatibility condition. In this paper, we solve the initial value problem for the LKdV equation through a discrete implementation of the inverse scattering transform method applied to the Lax pair. The initial value used for the LKdV equation is assumed to be real and decaying to zero as the absolute value of the discrete spatial variable approaches large values. An interesting feature of our approach is the solution of a discrete Gel'fand-Levitan equation. Moreover, we provide a complete characterization of reflectionless potentials and show that this leads to the Cauchy matrix form of N-soliton solutions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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