English

A harmonic mean inequality for the $q-$gamma and $q-$digamma functions

Classical Analysis and ODEs 2020-05-20 v1

Abstract

We prove amongs others results that the harmonic mean of Γq(x)\Gamma_q(x) and Γq(1/x)\Gamma_q(1/x) is greater than or equal to 11 for arbitrary x>0x > 0 and qJq\in J where JJ is a subset of [0,+)[0,+\infty). Also, we prove that for there is p0(1,9/2)p_0\in(1,9/2), such that for q(0,p0)q\in(0,p_0), ψq(1)\psi_q(1) is the minimum of the harmonic mean of ψq(x)\psi_q(x) and ψq(1/x)\psi_q(1/x) for x>0x > 0 and for q(p0,+)q\in(p_0,+\infty), ψq(1)\psi_q(1) is the maximum. Our results generalize some known inequalities due to Alzer and Gautschi.

Keywords

Cite

@article{arxiv.2005.08945,
  title  = {A harmonic mean inequality for the $q-$gamma and $q-$digamma functions},
  author = {Mohamed Bouali},
  journal= {arXiv preprint arXiv:2005.08945},
  year   = {2020}
}