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arXiv 0906.0624math-phmath.MP
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Tau函数与广义双分次Toda族的Hirota双线性方程

Tau function and Hirota bilinear equations for the Extended bigraded Toda Hierarchy

Chuanzhong Li, Jingsong He, Ke Wu, Yi Cheng

摘要:

本文将Sato理论推广到扩展的双阶Toda族(EBTH).修正了Lax方程的定义,给出了Sato方程,波算子,Hirota双线性恒等式(HBI),证明了$tau$函数$τ(t)$的存在性.同时证明了它的类Fay恒等式和Hirota双线性方程(HBE)的有效性。与通常可积系统的高次方程组不同,目前的高次方程组是包含$e^{\partial_x}$和$τ(t)$的算子乘积方程。

英文摘要:

In this paper we generalize the Sato theory to the extended bigraded Toda hierarchy (EBTH). We revise the definition of the Lax equations,give the Sato equations, wave operators, Hirota bilinear identities (HBI) and show the existence of $tau$ function $τ(t)$. Meanwhile we prove the validity of its Fay-like identities and Hirota bilinear equations (HBEs) in terms of vertex operators whose coefficients take values in the algebra of differential operators. In contrast with HBEs of the usual integrable system, the current HBEs are equations of product of operators involving $e^{\partial_x}$ and $τ(t)$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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