Differential equation and inequalities of the generalized k-Bessel functions

J Inequal Appl. 2018;2018(1):175. doi: 10.1186/s13660-018-1772-1. Epub 2018 Jul 16.

Abstract

In this paper, we introduce and study a generalization of the k-Bessel function of order ν given by Wν,ck(x):=r=0(-c)rΓk(rk+ν+k)r!(x2)2r+νk. We also indicate some representation formulae for the function introduced. Further, we show that the function Wν,ck is a solution of a second-order differential equation. We investigate monotonicity and log-convexity properties of the generalized k-Bessel function Wν,ck , particularly, in the case c=-1 . We establish several inequalities, including a Turán-type inequality. We propose an open problem regarding the pattern of the zeroes of Wν,ck .

Keywords: Monotonicity; Turán-type inequality; k-Bessel; k-Gamma.