arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2202.02049math.CA
收藏

Humbert超Bessel函数的渐近展开

The asymptotic expansion of the Humbert hyper-Bessel function

R B Paris

摘要:

本文考虑由\[J_{m,n}(x)=\frac{(x/3)^{m+n}}{m! n!}\,{}_0F_2(-\!\!\!-;m+1, n+1; -(x/3)^3)\]用${}_0F_2$超几何函数表示的Humbert超Bessel函数的渐近展开为$x\to+\infty$,其中$m$,$n$不一定是非负整数.特别注意的是指数小的贡献的确定。使用的主要方法是作者所描述的(J. COMPUT。{ \bf 234}(2010)488-504);还通过将鞍点方法应用于包含贝塞尔函数的整表示来获得首阶估计。数值结果证明了复合展开的准确性。

英文摘要:

We consider the asymptotic expansion of the Humbert hyper-Bessel function expressed in terms of a ${}_0F_2$ hypergeometric function by \[J_{m,n}(x)=\frac{(x/3)^{m+n}}{m! n!}\,{}_0F_2(-\!\!\!-;m+1, n+1; -(x/3)^3)\] as $x\to+\infty$, where $m$, $n$ are not necessarily non-negative integers. Particular attention is paid to the determination of the exponentially small contribution. The main approach utilised is that described by the author (J. Comput. Appl. Math. {\bf 234} (2010) 488-504); a leading-order estimate is also obtained by application of the saddle-point method applied to an integral representation containing a Bessel function. Numerical results are presented to demonstrate the accuracy of the resulting compound expansion.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑