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arXiv 1402.6730nlin.SImath-phmath.MP
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sl(4)相关可积系统中变量分离的轨道方法

Orbit Approach to Separation of Variables in sl(4)-Related Integrable Systems

Julia Bernatska

摘要:

利用轨道法对$\mathfrak{sl}(4)$圈代数中余伴轨道上的可积系统进行了变量分离。这是对Sklyanin分离变量方法的一种发展和解释。它表明,光谱曲线上的点作为分离变量的两个可积系统生活在两个通用的轨道嵌入到一个共同的流形。这些轨道被赋予不同的非奇异李泊松括号。给出了$\mathfrak{sl}(4)$循环代数的显式表达式。

英文摘要:

Separation of variables by means of the orbit method is implemented to integrable systems on coadjoint orbits in an $\mathfrak{sl}(4)$ loop algebra. This is a development and a kind of explanation for Sklyanin's procedure of separation of variables. It is shown that points on a spectral curve serve as variables of separation for two integrable systems living on two generic orbits embedded into a common manifold. These orbits are endowed with different nonsingular Lie-Poisson brackets. Explicit expressions for the case of $\mathfrak{sl}(4)$ loop algebra are given.

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