On the implementation of the asymptotic Filon-type method for infinite integrals with oscillatory Bessel kernels
On the implementation of the asymptotic Filon-type method for infinite integrals with oscillatory Bessel kernels
复制标题
振荡贝塞尔核无限积分渐近Filon型方法的实现
DOI:
10.1016/j.amc.2013.12.017
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发表时间:
2014-02
影响因子:
4
通讯作者:
Ruyun Chen
中科院分区:
文献类型:
--
作者:
Ruyun Chen
In this paper we consider the implementation of the asymptotic Filon-type method for the semi-infinite highly oscillatory Bessel integrals of the form∫ 1∞ f (x) C v (ω x) dx, where C v (ω x) denotes Bessel function J v (ω x) of the first kind, Y v (ω x) of the second kind, H v (1)(ω x) and H v (2)(ω x) of the third kind, and modified Bessel function K v (ω x) of the second kind, respectively, f is a smooth function on [1,∞), lim x→∞ f (k)(x)= 0 (k= 0, 1, 2,…) and ω is large. By approximating f by a linear combination of negative integer powers so that the moments can be expressed by some special functions, we complete the implementation of the method. Furthermore, we give the error analysis of the method for computing the integrals. The method is very efficient in obtaining very high precision approximations if ω is sufficiently large. Numerical examples are provided to confirm our analysis.
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