Communications of the
Korean Mathematical Society
CKMS

ISSN(Print) 1225-1763 ISSN(Online) 2234-3024

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Commun. Korean Math. Soc. 2012; 27(2): 257-264

Printed June 1, 2012

https://doi.org/10.4134/CKMS.2012.27.2.257

Copyright © The Korean Mathematical Society.

Certain integral representations of Euler type for the Exton function $X_8$

Junesang Choi, Anvar Hasanov, and Mamasali Turaev

Dongguk University, Dongguk University, Dongguk University

Abstract

Exton introduced 20 distinct triple hypergeometric functions whose names are $X_i$ $(i=1,\,\ldots,\,20)$ to investigate their twenty Laplace integral representations whose kernels include the confluent hypergeometric functions ${}_0F_1$, ${}_1F_1$, a Humbert function $\Psi_1$, and a Humbert function $\Phi_2$. The object of this paper is to present 18 new integral representations of Euler type for the Exton hypergeometric function $X_8$, whose kernels include the Exton functions ($X_2$, $X_8$) itself, the Horn's function $H_4$, the Gauss hypergeometric function $F$, and Lauricella hypergeometric function $F_C$. We also provide a system of partial differential equations satisfied by $X_8$.

Keywords: generalized hypergeometric series, multiple hypergeometric functions, integrals of Euler type, Laplace integral, Exton functions $X_i$, Humbert functions, Appell-Horn function $H_4$, Lauricella hypergeometric function $F_C$

MSC numbers: Primary 33C20, 33C65; Secondary 33C05, 33C60, 33C70, 68Q40, 11Y35