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arXiv 2001.02944nlin.SImath-phmath.MP
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(2 + 1)维Sawada-Kotera方程新的多孤子解族

New hierarchy of multiple soliton solutions for the (2+1)-dimensional Sawada-Kotera equation

Ruoxia Yao, Yan Li, Senyue Lou

摘要:

首先给出了(2 + 1)维Sawada-Kotera(2DSK)方程的一个新的变换$u=4 ({\rm ln}f)_x$,该变换可以表示一个五次线性方程和一对Hirota双线性方程,从而可以得到2DSK方程的一个新的多孤子解族.它揭示了一个重要的事实,即一个非线性偏微分方程可以有两族多孤子解,而2DSK方程是本文发现的第一个也是唯一的一个多孤子解。五次线性方程由一对Hirota双线性方程求解,其中一个是由$u=2 ({\rm ln}f)_{x}$得到的(2 + 1)维双线性SK方程,另一个是双线性KdV方程.(1 + 1)维SK方程不具有这种性质。作为另一个例子,研究了一个(3 + 1)维非线性偏微分方程,它具有一对Hirota双线性方程,但只具有一族多孤子解.

英文摘要:

A new transformation $u=4 ({\rm ln}f)_x$ that can formulate a quintic linear equation and a pair of Hirota's bilinear equations for the (2+1)-dimensional Sawada-Kotera (2DSK) equation is reported firstly, which enables one to obtain a new hierarchy of multiple soliton solutions of the 2DSK equation. It tells a crucial fact that a nonlinear partial differential equation could possess two hierarchies of multiple soliton solutions and the 2DSK equation is the first and only one found in this paper. The quintic linear equation is solved by a pair of Hirota's bilinear equations, of which one is the (2+1)-dimensional bilinear SK equation obtained by $u=2 ({\rm ln}f)_{x}$, and the other is the bilinear KdV equation. The (1+1)-dimensional SK equation does not possess this property. As another example, a (3+1)-dimensional nonlinear partial differential equation possessing a pair of Hirota's bilinear equations, however only bearing one hierarchy of multiple soliton solutions is studied.

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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