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arXiv · 2610.38625

Approximating the poles of a Painlevé V transcendent for the Fredholm determinant of the sine kernel

Walter Van Assche
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Abstract

The Fredholm determinant of the sine kernel has an expression as an integral containing a Painlevé transcendent $r$ satisfying Painlevé V, in the same way that the Fredholm determinant of the Airy kernel has an expression involving the Hastings-McLeod solution of Painlevé II. In this paper we use Padé approximation to approximate the poles of this Painlevé transcendent $r$ in the complex plane. We use Padé approximation near $0$, Hermite-Padé approximation near $0$ and two-point Padé approximation near $0$ and infinity.

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Walter Van Assche. 2026-10-28. Approximating the poles of a Painlevé V transcendent for the Fredholm determinant of the sine kernel. https://arxiv.org/abs/2610.38625

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