arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.02296nlin.SImath-phmath.MPnlin.PS
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一个(2+1)维可积KdV方程的Painlevé性质、局部和非局部对称性及对称性约化

Painlevé property, local and nonlocal symmetries and symmetry reductions for a (2+1)-dimensional integrable KdV equation

Xiao-Bo Wang, Man Jia, S. Y. Lou

AI总结:

本文证明了(2+1)维cKP3-4方程的Painlevé性质,利用截断展开求得非局部对称性及Bäcklund变换,基于局部点对称性的Kac-Moody-Virasoro代数导出群不变约化及新Lax可积模型。

摘要:

利用Kruskal简化方法,证明了组合KP3(Kadomtsev-Petviashvili)和KP4的(2+1)维Korteweg-de Vries (KdV)扩展(即cKP3-4)的Painlevé性质。利用截断的Painlevé展开,找到了Schwartz形式、Bäcklund/Levi变换以及残余非局部对称性。将残余对称性局域化以寻找其有限Bäcklund变换。该模型的局部点对称性构成了一个无中心的Kac-Moody-Virasoro代数。利用局部点对称性寻找相关的群不变约化,包括一个具有四阶谱问题的新Lax可积模型。通过直接方法获得了有限变换定理或李点对称群。

英文摘要:

The Painlevé property for a (2+1)-dimensional Korteweg-de Vries (KdV) extension, the combined KP3 (Kadomtsev- Petviashvili) and KP4 (cKP3-4) is proved by using Kruskal's simplification. The truncated Painlevé expansion is used to find the Schwartz form, the Bäcklund/Levi transformations and the residual nonlocal symmetry. The residual symmetry is localized to find its finite Bäcklund transformation. The local point symmetries of the model constitute a centerless Kac-Moody-Virasoro algebra. The local point symmetries are used to find the related group invariant reductions including a new Lax integrable model with a fourth order spectral problem. The finite transformation theorem or the Lie point symmetry group is obtained by using a direct method.

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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