77 citations · 90 across the 2 of their papers we have counts for
2 papers
math.CA2009★ 77 cited
Complete monotonicity of some functions involving polygamma functions
Feng Qi, Senlin Guo, Bai-Ni Guo
In the present paper, we establish necessary and sufficient conditions for the functions and $α\bigl\lvertψ^{(i)}(x+β)\bigr\lvert-x\bigl\lve…
math.CA2009★ 13 cited
More supplements to a class of logarithmically completely monotonic functions associated with the gamma function
Senlin Guo, Feng Qi
In this article, a necessary and sufficient condition and a necessary condition are established for a function involving the gamma function to be logarithmically completely monoton…