Open Access

ARTICLE

Complete Monotonicity of Functions Related to Trigamma and Tetragamma Functions

Mona Anis¹, Hanan Almuashi², Mansour Mahmoud^3,*

1 Faculty of Science, Mathematics Department, Mansoura University, Mansoura, 35516, Egypt
2 Faculty of Science, Mathematics Department, Jeddah University, Jeddah, 21589, Saudi Arabia
3 Faculty of Science, Mathematics Department, King Abdulaziz University, Jeddah, 21589, Saudi Arabia

* Corresponding Author: Mansour Mahmoud. Email: