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arXiv 2202.07588nlin.SImath-phmath.MP
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关于椭圆曲线上的耦合Kadomtsev-Petviashvili方程组

On a coupled Kadomtsev--Petviashvili system associated with an elliptic curve

Wei Fu, Frank W. Nijhoff

摘要:

Date,Jimbo和Miwa提出的与椭圆曲线相关的耦合Kadomtsev-Petviashvili系统[J. Phys. Soc. Jpn.,52:766--771,1983],在直接线性化的框架内重新研究,从一般线性积分方程的角度为我们提供了对该椭圆模型可积性的更多了解。结果,我们不仅成功地构造了由$2\times2$矩阵形式的微分算子组成的椭圆耦合Kadomtsev-Petviashvili系统的拉克斯对,而且构造了相位由椭圆曲线上的点参数化的多孤子解.降维的基础上的直接线性化,椭圆耦合Korteweg-de Vries和Boussinesq系统,也进行了讨论。此外,还得到了具有非零常数背景的$D_\infty$型Kadomtsev-Petviashvili方程的一类新的解.

英文摘要:

The coupled Kadomtsev--Petviashvili system associated with an elliptic curve, proposed by Date, Jimbo and Miwa [J. Phys. Soc. Jpn., 52:766--771, 1983], is reinvestigated within the direct linearisation framework, which provides us with more insights into the integrability of this elliptic model from the perspective of a general linear integral equation. As a result, we successfully construct for the elliptic coupled Kadomtsev--Petviashvili system not only a Lax pair composed of differential operators in $2\times2$ matrix form but also multi-soliton solutions with phases parametrised by points on the elliptic curve. Dimensional reductions based on the direct linearisation, to the elliptic coupled Korteweg-de Vries and Boussinesq systems, are also discussed. In addition, a novel class of solutions are obtained for the $D_\infty$-type Kadomtsev--Petviashvili equation with nonzero constant background as a byproduct.

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