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arXiv 1909.03561math.DGmath-phmath.MP
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关于半单李代数平凡中心扩张上的线性二次Poisson束

On linear-quadratic Poisson pencils on trivial central extensions of semisimple Lie algebras

Andriy Panasyuk, Vsevolod Shevchishin

摘要:

研究了半单李代数的平凡1维中心扩张上的二次Poisson结构与标准线性Poisson结构的相容性。特别是,我们开发的一般理论,这种结构和研究相关的家庭功能对合。我们还证明了在$\gl(3)^*$上存在一个10参数的二次Poisson结构族,它与标准线性Poisson结构相容,并且包含了最近由Vladimir Sokolov引入的3参数的二次双向量族.与相应Poisson束相关的多项式函数的对合族包含椭圆Calogero-Moser系统的多项式形式的哈密顿量。

英文摘要:

The paper is devoted to quadratic Poisson structures compatible with the canonical linear Poisson structures on trivial 1-dimensional central extensions of semisimple Lie algebras. In particular, we develop the general theory of such structures and study related families of functions in involution. We also show that there exists a 10-parametric family of quadratic Poisson structures on $\gl(3)^*$ compatible with the canonical linear Poisson structure and containing the 3-parametric family of quadratic bivectors recently introduced by Vladimir Sokolov. The involutive family of polynomial functions related to the corresponding Poisson pencils contains the hamiltonian of the polynomial form of the elliptic Calogero--Moser system.

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