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arXiv 0707.1950nlin.SImath-phmath.MP
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BC型Toda格的贝克隆变换

Bäcklund Transformation for the BC-Type Toda Lattice

Vadim Kuznetsov, Evgeny Sklyanin

摘要:

研究了n粒子Toda格的一种可积情形:边界项含4个参数的开链。对于这个模型,我们构造了一个贝克隆变换,并证明了它的基本性质:正则性,交换性和谱性。贝克隆变换也可以看作是离散化的时间动力学。使用两个Lax矩阵:2阶和2n+2阶,它们是相互对偶的,共享相同的谱曲线。

英文摘要:

We study an integrable case of n-particle Toda lattice: open chain with boundary terms containing 4 parameters. For this model we construct a Bäcklund transformation and prove its basic properties: canonicity, commutativity and spectrality. The Bäcklund transformation can be also viewed as a discretized time dynamics. Two Lax matrices are used: of order 2 and of order 2n+2, which are mutually dual, sharing the same spectral curve.

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