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arXiv 0903.3586nlin.SI
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2 + 1维可积方程:无色散极限的变形

Integrable equations in 2+1-dimensions: deformations of dispersionless limits

E. V. Ferapontov, A. Moro, V. S. Novikov

摘要:

本文对2 + 1维三阶可积方程进行了分类,推广了Kadomtsev-Petviashvili,Veselov-Novikov和Harry Dym方程的例子.我们的方法是基于这样的观察,即2 + 1维可积系统的无色散极限具有无穷多个来自所谓的流体动力学约化的多相解。%相反,水动力减少的存在的要求被证明是一个有效的分类标准。在本文中,我们采用了一种新的扰动方法的分类问题。基于流体动力学约化的方法,我们首先对2 + 1维空间中可能作为孤子方程的无色散极限出现的可积拟线性系统进行了分类。为了重建色散变形,我们要求所有的流体动力学减少的无色散限制继承相应的色散对应。这个过程导致一个完整的列表可积三阶方程,其中一些显然是新的。

英文摘要:

We classify integrable third order equations in 2+1 dimensions which generalize the examples of Kadomtsev-Petviashvili, Veselov-Novikov and Harry Dym equations. Our approach is based on the observation that dispersionless limits of integrable systems in 2+1 dimensions possess infinitely many multi-phase solutions coming from the so-called hydrodynamic reductions. %Conversely, the requirement of the existence of hydrodynamic reductions proves to be an efficient classification criterion. In this paper we adopt a novel perturbative approach to the classification problem. Based on the method of hydrodynamic reductions, we first classify integrable quasilinear systems which may (potentially) occur as dispersionless limits of soliton equations in 2+1 dimensions. To reconstruct dispersive deformations, we require that all hydrodynamic reductions of the dispersionless limit are inherited by the corresponding dispersive counterpart. This procedure leads to a complete list of integrable third order equations, some of which are apparently new.

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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