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arXiv 1903.09040nlin.SI
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图上的Ablowitz-Ladik系统

The Ablowitz-Ladik system on a graph

Baoqiang Xia

摘要:

本文给出了一种研究图上可积非线性微分差分方程初边值问题的方法。作为一个说明性的例子,我们考虑的Ablowitz-Ladik系统上构成的图是由$N$半无限格(边)通过一些边界条件连接。首先证明了分析该问题等价于分析某个矩阵的IBV问题,然后采用统一变换法(UTM)分析了该矩阵的IBV问题。我们还将我们的结果与一些以前已知的研究进行了比较。特别是,我们表明,逆散射方法(ISM)的整数上的可积DDE可以恢复从UTM应用到我们的$N=2$图问题作为一个特殊的情况下,和可积DDE的非局部约简可以从我们的结果获得的局部约简。

英文摘要:

This paper presents an approach to study initial-boundary value (IBV) problems for integrable nonlinear differential-difference equations (DDEs) posed on a graph. As an illustrative example, we consider the Ablowitz-Ladik system posed on a graph that is constituted by $N$ semi-infinite lattices (edges) connected through some boundary conditions. We first show analyzing this problem is equivalent to analyzing a certain matrix IBV problem; then we employ the unified transform method (UTM) to analyze this matrix IBV problem. We also compare our results with some previously known studies. In particular, we show that the inverse scattering method (ISM) for the integrable DDEs on the integers can be recovered from the UTM applied to our $N=2$ graph problem as a particular case, and the nonlocal reductions of integrable DDEs can be obtained as local reductions from our results.

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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