Large-Degree Asymptotics of Rational Painlevé-IV Solutions by the Isomonodromy Method
Large-Degree Asymptotics of Rational Painlevé-IV Solutions by the Isomonodromy Method
复制标题
有理 Painlevé-IV 解的等单律法的大度渐近
DOI:
10.1007/s00365-022-09586-1
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发表时间:
2022
影响因子:
2.7
通讯作者:
Miller, Peter D.
中科院分区:
文献类型:
--
作者:
Buckingham, Robert J.;Miller, Peter D.
The Painlevé-IV equation has two families of rational solutions generated, respectively, by the generalized Hermite polynomials and the generalized Okamoto polynomials. We apply the isomonodromy method to represent all of these rational solutions by means of two related Riemann–Hilbert problems, each of which involves two integer-valued parameters related to the two parameters in the Painlevé-IV equation. We then use the steepest-descent method to analyze the rational solutions in the limit that at least one of the parameters is large. Our analysis provides rigorous justification for formal asymptotic arguments that suggest that in general solutions of Painlevé-IV with large parameters behave either as an algebraic function or an elliptic function. Moreover, the results show that the elliptic approximation holds on the union of a curvilinear rectangle and, in the case of the generalized Okamoto rational solutions, four curvilinear triangles each of which shares an edge with the rectangle; the algebraic approximation is valid in the complementary unbounded domain. We compare the theoretical predictions for the locations of the poles and zeros with numerical plots of the actual poles and zeros obtained from the generating polynomials, and find excellent agreement.
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DOI:
--
发表时间:
2004
期刊:
Proceedings of Institute of Mathematics of Minsk 12.2
影响因子:
--
作者:
Clarkson P.A.;Filipuk G.V.
通讯作者:
Filipuk G.V.
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
P. Clarkson
通讯作者:
P. Clarkson
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
I. Marquette;C. Quesne
通讯作者:
C. Quesne
影响因子:
1
作者:
R. Buckingham
通讯作者:
R. Buckingham
影响因子:
1.7
作者:
D. Masoero;Pieter Roffelsen
通讯作者:
Pieter Roffelsen