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arXiv math/9912114math.QA
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C_2型椭圆型Macdonald-Ruijsenaars差分方程组的对角化

Diagonalization of the elliptic Macdonald-Ruijsenaars difference system of type C_2

Tetsuya Kikuchi

摘要:

研究了C_2型动力学杨-巴克斯特方程的椭圆解所产生的一对可交换差分算子.算子作用在sp(4,C)的权空间上的亚纯函数空间上.我们表明,这些运营商可以识别系统的范Diejen和Komori-Hikami与特殊参数。结果表明,我们的情形可以与差分Lame算子(二体Ruijsenaars算子)相联系,从而在C_2^{(1)}-仿射李代数的水平一特征标所构成的有限维空间上对角化系统.

英文摘要:

We study a pair of commuting difference operators arising from the elliptic solution of the dynamical Yang-Baxter equation of type C_2. The operators act on the space of meromorphic functions on the weight space of sp(4,C). We show that these operators can be identified with the system by van Diejen and by Komori-Hikami with special parameters. It turns out that our case can be related to the difference Lame operator (two-body Ruijsenaars operator) and thereby we diagonalize the system on the finite dimensional space spanned by the level one characters of the C_2^{(1)}-affine Lie algebra.

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