Quadratic algebras and integrable chains

Details Quadratic algebras and integrable chains Quadratic algebras and integrable chains

2008-11-24

arxiv.org/abs/0811.3784v3

International Mathematics Research Notices 2009

Physics

Mathematical Physics

24 pages

Scientific paper

10.1093/imrn/rnp178

Using Krichever-Phong's universal formula, we show that a multiplicative representation linearizes Sklyanin quadratic brackets for a multi-pole Lax function with a spectral parameter. The spectral parameter can be either rational or elliptic. As a by-product, we obtain an extension of a Sklyanin algebra in the elliptic case. Krichever-Phong's formula provides a hierarchy of symplectic structures, and we show that there exists a non-trivial cubic bracket in Sklyanin's case.

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