Geodesic
On one sum of Hankel--Clifford integral transforms of Whittaker functions
Čebyševskij sbornik, Tome 20 (2019) no. 3, pp. 349-360

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In [11], the authors considered the realization $T$ of $SO(2,2)$-representation in a space of homogeneous functions on $2\times4$-matrices. In this sequel, we aim to compute matrix elements of the identical operator $T(e)$ and representation operator $T(g)$ for an appropriate $g$ with respect to the mixed basis related to two different bases in the $SO(2,2)$-carrier space and evaluate some improper integrals involving a product of Bessel-Clifford and Whittaker functions. The obtained result can be rewritten in terms of Hankel-Clifford integral transforms and their analogue. The first and the second Hankel-Clifford transforms introduced by Hayek and Pérez–Robayna, respectively, play an important role in the theory of fractional order differential operators (see, e.g., [6, 8]). The similar result have been derived recently by the authors for the regular Coulomb function in [12].
Keywords: group $SO(2,2)$, matrix elements of representation, Hankel-Clifford integral transform, Macdonald-Clifford integral transform, Whittaker functions, Bessel-Clifford functions. 
@article{CHEB_2019_20_3_a22,
     author = {J. Choi and A. I. Nizhnikov and I. Shilin},
     title = {On one sum of {Hankel--Clifford} integral transforms of {Whittaker} functions},
     journal = {\v{C}eby\v{s}evskij sbornik},
     pages = {349--360},
     publisher = {mathdoc},
     volume = {20},
     number = {3},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CHEB_2019_20_3_a22/}
}
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J. Choi; A. I. Nizhnikov; I. Shilin. On one sum of Hankel--Clifford integral transforms of Whittaker functions. Čebyševskij sbornik, Tome 20 (2019) no. 3, pp. 349-360. http://geodesic.mathdoc.fr/item/CHEB_2019_20_3_a22/