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arXiv 1101.3756math.CAmath.CV
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连带Legendre函数整表示的参数微分

On Parameter Differentiation for Integral Representations of Associated Legendre Functions

Howard S. Cohl

摘要:

对于相关勒让德函数用修正贝塞尔函数表示的整表示,我们证明了在积分符号下关于参数微分的合理性.有了这个理由,第一和第二类相关的勒让德函数的导数相对于程度评估在奇数半整数度,一般复杂的订单,和导数相对于订单评估在整数阶,一般复杂的程度。我们还讨论了由$f(z)=z/(\sqrt{z+1}\sqrt{z-1})$给出的复变函数$f:{\mathbb C}\setminus\{-1,1\}\to{\mathbb C}$的性质。

英文摘要:

For integral representations of associated Legendre functions in terms of modified Bessel functions, we establish justification for differentiation under the integral sign with respect to parameters. With this justification, derivatives for associated Legendre functions of the first and second kind with respect to the degree are evaluated at odd-half-integer degrees, for general complex-orders, and derivatives with respect to the order are evaluated at integer-orders, for general complex-degrees. We also discuss the properties of the complex function $f:{\mathbb C}\setminus\{-1,1\}\to{\mathbb C}$ given by $f(z)=z/(\sqrt{z+1}\sqrt{z-1})$.

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