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arXiv 1302.7288math.COhep-thmath.CVnlin.SI
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无色散二维Toda族的对称解、Hurwitz数和共形动力学

Symmetric solutions to dispersionless 2D Toda hierarchy, Hurwitz numbers and conformal dynamics

S. M. Natanzon, A. V. Zabrodin

摘要:

我们明确地构建了一个系列的展开的解决方案的2D户田族在零色散极限,我们称之为对称的解决方案。我们通过一些通用的组合常数来表示泰勒系数,并找到它们的递推关系。利用这些结果得到亏格为0的双Hurwitz数的新公式。它们也可以作为一个起点,建设性的方法,黎曼映射问题和反潜在的问题在2D。

英文摘要:

We explicitly construct the series expansion for a certain class of solutions to the 2D Toda hierarchy in the zero dispersion limit, which we call symmetric solutions. We express the Taylor coefficients through some universal combinatorial constants and find recurrence relations for them. These results are used to obtain new formulas for the genus 0 double Hurwitz numbers. They can also serve as a starting point for a constructive approach to the Riemann mapping problem and the inverse potential problem in 2D.

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