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arXiv 2102.00684nlin.SImath-phmath.MP
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关于Hirota离散Korteweg-de Vries方程的三维相容性

On the three-dimensional consistency of Hirota's discrete Korteweg-de Vries Equation

Nalini Joshi, Nobutaka Nakazono

摘要:

Hirota离散Korteweg-de Vries方程(dKdV)是二维整数格上的一个可积偏差分方程,它在连续极限下逼近Korteweg-de Vries方程.我们发现新的变换到其他方程,包括二度二阶偏差分方程,这提供了一个不寻常的嵌入到三维晶格。由此产生的系统的一致性扩展了已被广泛用于研究多维格上的偏差分方程的属性。

英文摘要:

Hirota's discrete Korteweg-de Vries equation (dKdV) is an integrable partial difference equation on 2-dimensional integer lattice, which approaches the Korteweg-de Vries equation in a continuum limit. We find new transformations to other equations, including a second-degree second-order partial difference equation, which provide an unusual embedding into a three-dimensional lattice. The consistency of the resulting system extends a property that has been widely used to study partial difference equations on multidimensional lattices.

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