On the exact steepest descent method: A new method for the description of Stokes curves

On the exact steepest descent method: A new method for the description of Stokes curves
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论精确最速下降法:一种描述斯托克斯曲线的新方法

DOI:
10.1063/1.1368138
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发表时间:
2001
影响因子:
1.3
通讯作者:
Yoshitsugu Takei
Yoshitsugu Takei
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
T. Aoki;T. Kawai;Yoshitsugu Takei

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为了确定m阶(m ≠ 3)多项式系数常微分方程P ≠ 0的WKB解的Borel和的定义区域,我们将最速下降法应用于P ≠ 0的WKB解的拉普拉斯积分,其中P表示P的拉普拉斯变换。我们引入了精确最速下降路的新概念,它是分支最速下降路的并。理论和计算机辅助的实验研究都显示了这一概念的重要性。
In order to determine the region where the Borel sum of a Wentzel–Kramers–Brillouin (WKB) solution ψ of an mth order (m⩾3) ordinary differential equation Pψ=0 with polynomial coefficients is well defined, we apply the steepest descent method to the Laplace integral of a WKB solution ψ of Pψ=0, with P denoting the Laplace transform of P. As a counterpart of the connection formula for ψ, we introduce a new notion of the exact steepest descent path, which is the union of bifurcated steepest descent paths. Both theoretical and computer-assisted experimental studies are given to show the importance of this notion.
Bender-Wu分析和Voros理论(第二部分)
DOI: --
发表时间: 2007
期刊:
影响因子: --
作者:
Takashi Aoki;Takahiro Kawai and Yoshitsugu Takei
通讯作者: Takahiro Kawai and Yoshitsugu Takei