arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.05998math-phmath.MPnlin.SI
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Cauchy双正交多项式的双参数推广与可积格

Two-parameter generalisations of Cauchy bi-orthogonal polynomials and integrable lattices

Xiang-Ke Chang, Shi-Hao Li, Satoshi Tsujimoto, Guo-Fu Yu

摘要:

本文考虑广义双参数Cauchy双矩阵模型和相应的可积格点方程。证明了当参数为$1/k_i$时,当$k_i\in\mathbb{Z}_{>0}$($i=1,\,2$)时,平均特征多项式具有$(k_1+k_2+2)$项递推关系,这为我们提供了可积格的谱问题.τ函数则由广义柯西二矩阵模型的配分函数和Gram行列式给出。最简单的例子与精确的可解性证明。

英文摘要:

In this article, we consider the generalised two-parameter Cauchy two-matrix model and corresponding integrable lattice equation. It is shown that with parameters chosen as $1/k_i$ when $k_i\in\mathbb{Z}_{>0}$ ($i=1,\,2$), the average characteristic polynomials admit $(k_1+k_2+2)$-term recurrence relations, which provide us spectral problems for integrable lattices. The tau function is then given by the partition function of the generalised Cauchy two-matrix model as well as Gram determinant. The simplest example with exact solvability is demonstrated.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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