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arXiv 1602.04320math-phmath.AGmath.MP
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Lax算子代数与可积系统

Lax operator algebras and integrable systems

Oleg K. Sheinman

摘要:

给出了一类新的无限维Lax算子代数,并给出了Riemann曲面上带谱参数的有限维可积系统(如Calogero-Moser系统和Hitchin系统)的统一方法.特别地,我们的方法包括(非扭曲的)卡茨-穆迪代数和具有有理谱参数的可积系统。介绍是基于相当简单的想法有关的分级半单李代数,和他们的相互作用与黎曼-罗克定理。Lax算子代数的基本性质,以及可积系统理论的基本事实,都是从这个一般的观点来处理(并证明)的,特别是交换族的存在性及其Hamilton性质。我们的结论与应用的Lax算子代数预量子化的有限维可积系统。

英文摘要:

A new class of infinite-dimensional Lie algebras given a name of Lax operator algebras, and the related unifying approach to finite-dimensional integrable systems with spectral parameter on a Riemann surface, such as Calogero--Moser and Hitchin systems, are presented. In particular, our approach includes (the non-twisted) Kac--Moody algebras and integrable systems with rational spectral parameter. The presentation is based on the quite simple ideas related to gradings of semisimple Lie algebras, and their interaction with the Riemann--Roch theorem. The basic properties of the Lax operator algebras, as well as the basic facts of the theory of integrable systems in question, are treated (and proven) from this general point of view, in particular existence of commutative hierarchies and their Hamiltonian properties. We conclude with an application of the Lax operator algebras to prequantization of finite-dimensional integrable systems.

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