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arXiv 1004.2945nlin.SImath-phmath.MP
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扩张相空间上的Lax可积微分差分动力系统

The Lax Integrable Differential-Difference Dynamical Systems on Extended Phase Spaces

Oksana Ye. Hentosh

摘要:

通过构造一个特殊的Backlund变换,得到了移位算子李代数的对偶空间上的Lax型流族的Hamilton表示以及相应谱问题的伴随特征函数和演化.相应的一组平方本征函数对称性的阶层的哈密顿描述表示。分析了这些族与Lax可积(2+1)维微分差分系统及其三重Lax型线性化的关系。还解决了移位算子李代数的中心扩张的对偶空间上的耦合Lax型族的Hamilton表示的存在性问题。

英文摘要:

The Hamiltonian representation for the hierarchy of Lax-type flows on a dual space to the Lie algebra of shift operators coupled with suitable eigenfunctions and adjoint eigenfunctions evolutions of associated spectral problems is found by means of a specially constructed Backlund transformation. The Hamiltonian description for the corresponding set of squared eigenfunction symmetry hierarchies is represented. The relation of these hierarchies with Lax integrable (2+1)-dimensional differential-difference systems and their triple Lax-type linearizations is analysed. The existence problem of a Hamiltonian representation for the coupled Lax-type hierarchy on a dual space to the central extension of the shift operator Lie algebra is solved also.

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