@Article{cmes.2022.016927,
AUTHOR = {Mona Anis, Hanan Almuashi, Mansour Mahmoud},
TITLE = {Complete Monotonicity of Functions Related to Trigamma and Tetragamma Functions},
JOURNAL = {Computer Modeling in Engineering \& Sciences},
VOLUME = {131},
YEAR = {2022},
NUMBER = {1},
PAGES = {263--275},
URL = {http://www.techscience.com/CMES/v131n1/46614},
ISSN = {1526-1506},
ABSTRACT = {In this paper, we study the completely monotonic property of two functions involving the function △(x) = <img src="http://www.techscience.com/ueditor/files/131.1.png" width="75px"> and deduce the double inequality
<img src="http://www.techscience.com/ueditor/files/131.2.png" width="160px">, x > 0<br/>
which improve some recent results, where ψ(x) is the logarithmic derivative of the Gamma function. Also, we deduce the completely monotonic degree of a function involving ψ'(x).},
DOI = {10.32604/cmes.2022.016927}
}