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arXiv 1502.05971math.CA
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关于Bessel函数的阶导数

On the order derivatives of Bessel functions

T. M. Dunster

摘要:

研究了自变量为x(实或复)的Bessel函数关于ν阶的导数.代表性的积分,涉及的产品对贝塞尔函数,并反过来获得这些积分系列的扩展。从新的整表示出发,构造了包含Airy函数的阶导数的渐近逼近,其中ν是大的,且对无界正实x一致有效.

英文摘要:

The derivatives with respect to order ν for the Bessel functions of argument x (real or complex) are studied. Representations are derived in terms of integrals that involve the products pairs of Bessel functions, and in turn series expansions are obtained for these integrals. From the new integral representations, asymptotic approximations involving Airy functions are constructed for the order derivatives, for ν large and uniformly valid for unbounded positive real x.

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