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arXiv 0912.3833math-phmath.MP
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伪微分算子与可积模型

Pseudo-Differential Operators and Integrable Models

M. B. Sedra

摘要:

指出了伪微分算子理论在研究非线性可积系统中的重要性。主要研究作用在解析函数环$u_{s}(x, t)$上的非线性(局部和非局部)微分算子代数$Ξ$。它特别表明,这个空间分裂成几个类的子代数$Σ_{jr}, j=0,\pm 1, r=\pm 1$完全指定的量子数:$s$和$(p,q)$分别描述的共形重量(或自旋)和最低和最高的程度。局部(纯非局部)微分算子的代数${\huge Σ}_{++}$(及其对偶$Σ_{--}$)很重要,因为它给出了KdV系统的第二哈密顿结构的显式形式,我们也称之为Gelfand-Dickey泊松括号。这在之前的几项研究中已明确完成,目前参见\cite{4, 5, 14}。关于KdV和Boussinesq族的一些结果是明确的。

英文摘要:

The importance of the theory of pseudo-differential operators in the study of non linear integrable systems is point out. Principally, the algebra $Ξ$ of nonlinear (local and nonlocal) differential operators, acting on the ring of analytic functions $u_{s}(x, t)$, is studied. It is shown in particular that this space splits into several classes of subalgebras $Σ_{jr}, j=0,\pm 1, r=\pm 1$ completely specified by the quantum numbers: $s$ and $(p,q)$ describing respectively the conformal weight (or spin) and the lowest and highest degrees. The algebra ${\huge Σ}_{++}$ (and its dual $Σ_{--}$) of local (pure nonlocal) differential operators is important in the sense that it gives rise to the explicit form of the second hamiltonian structure of the KdV system and that we call also the Gelfand-Dickey Poisson bracket. This is explicitly done in several previous studies, see for the moment \cite{4, 5, 14}. Some results concerning the KdV and Boussinesq hierarchies are derived explicitly.

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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