@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) = and deduce the double inequality , x > 0
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} }