Global Asymptotics of Orthogonal Polynomials Associated with a Generalized Freud Weight
Global Asymptotics of Orthogonal Polynomials Associated with a Generalized Freud Weight
复制标题
与广义弗洛伊德权重相关的正交多项式的全局渐近
DOI:
10.1007/s11401-018-0082-8
复制
发表时间:
2018-04
期刊:
影响因子:
--
通讯作者:
Shuai-Xia Xu
中科院分区:
文献类型:
--
作者:
Zhi-Tao Wen;Roderick Wong;Shuai-Xia Xu
In this paper, the authors consider the asymptotic behavior of the monic polynomials orthogonal with respect to the weight function w(x) = vertical bar x vertical bar (2 alpha)e(-(x4+tx2)), x is an element of R, where alpha is a constant larger than -1/2 and t is any real number. They consider this problem in three separate cases: (i) c > -2, (ii) c = -2, mid (iii) c < -2, where c := tN(-1/2) is a constant, N = n + alpha and n is the degree of the polynomial. Tn the first two cases, the support of the associated equilibrium measure mu(t) is a single interval, whereas in the third case the support of mu(t) consists of two intervals. In each case, globally uniform asymptotic expansions are obtained in several regions. These regions together cover the whole complex plane. The approach is based on a modified version of the steepest descent method for Riemaun-Hilbert problems introduced by Deift and Zhou (1993).
登录
查看更多内容
DOI:
10.1002/(sici)1097-0312(199911)52:11
发表时间:
1999-11
影响因子:
3
作者:
P. Deift;T. Kriecherbauer;K. Mclaughlin;S. Venakides;Xin Zhou
通讯作者:
P. Deift;T. Kriecherbauer;K. Mclaughlin;S. Venakides;Xin Zhou
DOI:
10.1016/j.jat.2017.10.001
发表时间:
2016-06
期刊:
J. Approx. Theory
影响因子:
--
作者:
P. Clarkson;K. Jordaan
通讯作者:
P. Clarkson;K. Jordaan
影响因子:
4.9
作者:
T. Claeys;A. Kuijlaars;M. Vanlessen
通讯作者:
T. Claeys;A. Kuijlaars;M. Vanlessen
DOI:
10.1201/9781439864548
发表时间:
1974-06
期刊:
--
影响因子:
--
作者:
F. Olver
通讯作者:
F. Olver
DOI:
10.3233/asy-2008-0937
发表时间:
2009
期刊:
Asymptot. Anal.
影响因子:
--
作者:
R. Wong;Lun Zhang
通讯作者:
R. Wong;Lun Zhang