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arXiv 1201.4419nlin.SI
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离散KP族的鬼对称性

Ghost symmetry of the discrete KP hierarchy

Chuanzhong Li, Jipeng Cheng, Kelei Tian, Maohua Li, Jingsong He

摘要:

本文利用KP族的半离散形式--离散KP族的$S$函数和鬼对称性,导出了KP族的本征函数(伴随本征函数)上的鬼流以及它的Baker-Akhiezer函数和伴随Baker-Akhiezer函数的谱表示.从上面的这些观察中,可以看出离散KP层次结构和KP层次结构之间的一些重要区别。给出了τ函数上的鬼流和离散KP族的ASvM公式的另一种证明。

英文摘要:

In this paper, with the help of the $S$ function and ghost symmetry for the discrete KP hierarchy which is a semi-discrete version of the KP hierarchy, the ghost flow on its eigenfunction(adjoint eigenfunction) and the spectral representation of its Baker-Akhiezer function and adjoint Baker-Akhiezer function are derived. From these observations above, some important distinctions between the discrete KP hierarchy and KP hierarchy are shown. Also we give the ghost flow on the tau function and another kind of proof of the ASvM formula of the discrete KP hierarchy.

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