双曲Nizhnik-Novikov-Veselov方程与定常Davey-Stewartson II方程的关系
Relation between hyperbolic Nizhnik-Novikov-Veselov equation and stationary Davey-Stewartson II equation
摘要：
本文提出一个三元Lax系统，其中两个方程构成定常Davey-Stewartson II方程的拉克斯对。在一定的非线性约束下，该Lax系统的完全可积条件包含双曲型Nizhnik-Novikov-Veselov方程及其标准拉克斯对.利用Davey-Stewartson II方程的达布变换求解双曲型Nizhnik-Novikov-Veselov方程。利用达布变换，得到了整体$n$孤子解.证明了每个$n$ -孤子解在空间无穷远处一致地指数趋近于零，并且在时间无穷远处渐近于$n^2$峰丛。
英文摘要：
A Lax system in three variables is presented, two equations of which form the Lax pair of the stationary Davey-Stewartson II equation. With certain nonlinear constraints, the full integrability condition of this Lax system contains the hyperbolic Nizhnik-Novikov-Veselov equation and its standard Lax pair. The Darboux transformation for the Davey-Stewartson II equation is used to solve the hyperbolic Nizhnik-Novikov-Veselov equation. Using Darboux transformation, global $n$-soliton solutions are obtained. It is proved that each $n$-soliton solution approaches zero uniformly and exponentially at spatial infinity and is asymptotic to $n^2$ lumps of peaks at temporal infinity.
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