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Connections between the iterated (anti)derivatives of \(e^{s\sqrt{x}}\) with respect to \(x\) and spherical modified Bessel functions of second kind. (English) Zbl 1303.33022

Summary: We investigate the underlying structure of the \(n\)th derivative of \(e^{s\sqrt{x}}\) with respect to \(x\). For \(n \in \mathbb{Z}^{+}, \frac{d^{n}}{dx^{n}}e^{s\sqrt{x}}\) can be expressed in terms of spherical modified Bessel functions of second kind in the complex plane. The representation holds for \(n \in \mathbb Z^{-}\), where it represents the particular \(n\)-th antiderivative of \(e^{s\sqrt{x}}\) with all \(n\) constants of integration equal to zero. Our results introduce new connections among mathematical applications and provide some Bessel properties.

MSC:

33E30 Other functions coming from differential, difference and integral equations
33C10 Bessel and Airy functions, cylinder functions, \({}_0F_1\)
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