Asymptotic properties of special function solutions of Painlevé III equation for fixed parameters

Abstract

In this paper, we compute the small and large $x$ asymptotics of the special function solutions of Painlevé-III equation in the complex plane. We use the representation in terms of Toeplitz determinants of Bessel functions obtained in arXiv:nlin/0302026. Toeplitz determinants are rewritten as multiple contour integrals using Andrèief's identity. The small and large $x$ asymptotics are obtained using elementary asymptotic methods applied to the multiple contour integral. The asymptotics is extended to the whole complex plane using analytic continuation formulas for Bessel functions. The claimed result has not appeared in the literature before. We note that Toeplitz determinant representation is useful for numerical computations of corresponding solutions of the Painlevé-III equation.

arXiv comment44 pages, 11 figures. This is extended version compared to the tex in the journal. It contains computation of monodromy data and Asymptotics for values of parameters, that were missing earlier. See Appendices

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