Isomonodromic deformatiion with an irregular singularity and hyperelliptic curve

Details Isomonodromic deformatiion with an irregular singularity and hyperelliptic curve Isomonodromic deformatiion with an irregular singularity and hyperelliptic curve

2008-08-22

arxiv.org/abs/0808.3081v2

J. Phys. A 43 (2010), no. 11, 115205

Mathematics

Classical Analysis and ODEs

23 pages, 2 figures

Scientific paper

10.1088/1751-8113/43/11/115205

In this paper, we extend the result of Kitaev and Korotkin to the case where a monodromy-preserving deformation has an irregular singularity. For the monodromy-preserving deformation, we obtain the $\tau$-function whose deformation parameters are the positions of regular singularities and the parameter $t$ of an irregular singularity. Furthermore, the $\tau$-function is expressed by the hyperelliptic $\Theta$ function moving the argument $\z$ and the period $\B,$ where $t$ and the positions of regular singularities move $z$ and $\B,$ respectively.

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