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arXiv 1604.03082math-phmath.MPnlin.SI
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等单值τ函数的单值依赖和连接公式

Monodromy dependence and connection formulae for isomonodromic tau functions

A. Its, O. Lisovyy, A. Prokhorov

摘要:

本文讨论了有理系数线性常微分方程组的Jimbo-Miwa-Ueno微分1-形式到在扩展单值数据的全空间上封闭的形式的推广。这个推广是在M. Bertola推广了B.玛格兰奇我们展示了如何1-形式可以用来解决一个长期存在的问题,评估的连接公式的isomonodromic tau函数,其中包括一个明确的计算相关的常数因子。我们解释了这个计划是如何工作的Fuchsian系统,特别是,计算连接常数通用Painlevé VI tau函数。结果证明了\cite{ILT13}中提出的该常数的解析式。我们还将该方法应用于非Fuchsian系统,并评估Painlevé II tau函数渐近性中的常数因子。

英文摘要:

We discuss an extension of the Jimbo-Miwa-Ueno differential 1-form to a form closed on the full space of extended monodromy data of systems of linear ordinary differential equations with rational coefficients. This extension is based on the results of M. Bertola generalizing a previous construction by B. Malgrange. We show how this 1-form can be used to solve a long-standing problem of evaluation of the connection formulae for the isomonodromic tau functions which would include an explicit computation of the relevant constant factors. We explain how this scheme works for Fuchsian systems and, in particular, calculate the connection constant for generic Painlevé VI tau function. The result proves the conjectural formula for this constant proposed in \cite{ILT13}. We also apply the method to non-Fuchsian systems and evaluate constant factors in the asymptotics of Painlevé II tau function.

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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