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arXiv 1111.7163math-phhep-thmath.DSmath.MP
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关于根型拉克斯对的Calogero-Moser解

On the Calogero-Moser solution by root-type Lax pair

Timo Kluck

摘要:

有理Calogero-Moser系统的“根型拉克斯对”对于任何单根系都不能给出路径q(t)的解,而是给出内积(α,q(t))的值的解,其中α的范围是根系的所有根。但是,它并没有告诉我们哪一个内积的值对应于哪一个根。我们表明,解决方案确实是唯一的这些值(根系统自同构)在几乎所有的时间。我们通过反例证明了两个不同的q值有可能产生相同的内积(α,q)值集。由根系自同构引入的不确定性引起了路径何时穿过基本域的边界的问题。我们提出了一个代数方法来构建一个包含这些信息的指示函数。

英文摘要:

The `root type Lax pair' for the rational Calogero-Moser system for any simply-laced root system yields not a solution for the path q(t), but for the values of the inner products (α,q(t)), where α ranges over all roots of the root system. It does not, however, tell us which value of the inner product corresponds to which root. We show that the solution is indeed uniquely determined by these values (up to root system automorphisms) at almost all times. We show by counterexample that it is possible for two different values of q to yield the same set of values for the inner products (α,q). The indeterminacy introduced by the root system automorphisms gives rise to the question when the path crosses the boundary of the fundamental domains. We present an algebraic approach for constructing an indicator function containing this information.

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