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arXiv 1106.2640nlin.SI
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由含纯微分Hamilton算子的双Hamilton系统构造的几个新的可积系统

Some new integrable systems constructed from the bi-Hamiltonian systems with pure differential Hamiltonian operators

Yuqin Yao, Yehui Huang, Yuan Wei, Yunbo Zeng

摘要:

当双Hamilton系统的两个Hamilton算子都是纯微分算子时,我们证明了由\cite{kd}中的Kupershannon变形发展而来的广义Kupershannon变形(GKD)为从双Hamilton系统出发构造新的可积系统提供了一条有用的途径.在Harry Dym族、经典Boussinesq族和耦合KdV族的情形下,利用广义Kupershannon变形构造了一些新的可积系统.我们证明了HarryDym方程的GKD、经典Boussinesq方程的GKD和耦合KdV方程的GKD等价于这些孤子方程的新的可积Rosochatius变形。我们提出了这些新系统的拉克斯对。因此,广义Kupershatius变形为从双Hamilton系统构造新的可积系统提供了一条新的途径,也为获得具有自洽源的孤子方程的Rosochatius变形提供了一条新的途径.

英文摘要:

When both Hamiltonian operators of a bi-Hamiltonian system are pure differential operators, we show that the generalized Kupershmidt deformation (GKD) developed from the Kupershmidt deformation in \cite{kd} offers an useful way to construct new integrable system starting from the bi-Hamiltonian system. We construct some new integrable systems by means of the generalized Kupershmidt deformation in the cases of Harry Dym hierarchy, classical Boussinesq hierarchy and coupled KdV hierarchy. We show that the GKD of Harry Dym equation, GKD of classical Boussinesq equation and GKD of coupled KdV equation are equivalent to the new integrable Rosochatius deformations of these soliton equations with self-consistent sources. We present the Lax Pair for these new systems. Therefore the generalized Kupershmidt deformation provides a new way to construct new integrable systems from bi-Hamiltonian systems and also offers a new approach to obtain the Rosochatius deformation of soliton equation with self-consistent sources.

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