Rational Solutions of the Painlevé-III Equation: Large Parameter Asymptotics
Rational Solutions of the Painlevé-III Equation: Large Parameter Asymptotics
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Painlevé-III 方程的有理解:大参数渐近
DOI:
10.1007/s00365-019-09463-4
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发表时间:
2020
影响因子:
2.7
通讯作者:
Miller, Peter D.
中科院分区:
文献类型:
--
作者:
Bothner, Thomas;Miller, Peter D.
The Painlevé-III equation with parametersandhas a unique rational solutionwithwhenever. Using a Riemann–Hilbert representation proposed in Bothner et al. (Stud Appl Math 141:626–679, 2018), we study the asymptotic behavior ofin the limitwithheld fixed. We isolate an eye-shaped domainEin theplane that asymptotically confines the poles and zeros offor all values of the second parameterm. We then show that unlessmis a half-integer, the interior ofEis filled with a locally uniform lattice of poles and zeros, and the density of the poles and zeros is small near the boundary ofEbut blows up near the origin, which is the only fixed singularity of the Painlevé-III equation. In both the interior and exterior domains we provide accurate asymptotic formulæ forthat we compare withitself for finite values ofnto illustrate their accuracy. We also consider the exceptional cases wheremis a half-integer, showing that the poles and zeros ofnow accumulate along only one or the other of two “eyebrows,” i.e., exterior boundary arcs ofE.
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