Complete monotonicity of a family of functions involving the tri- and tetra-gamma functions

zbMath1321.33002arXiv1301.0156MaRDI QIDQ5500339

Feng Qi

Publication date: 5 August 2015

Full work available at URL: https://arxiv.org/abs/1301.0156

zbMATH Keywords

inequalitynecessary and sufficient conditioncompletely monotonic functionpolygamma functionDescartes' sign rule

Mathematics Subject Classification ID

Gamma, beta and polygamma functions (33B15) Monotonic functions, generalizations (26A48) Inequalities involving derivatives and differential and integral operators (26D10)

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