Mathematics – Classical Analysis and ODEs
Scientific paper
2009-04-26
Mathematics
Classical Analysis and ODEs
8 pages
Scientific paper
10.1080/10652469.2011.611331
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 monotonic on $(0,\infty)$. As applications of the
necessary and sufficient condition, some inequalities for bounding the psi and
polygamma functions and the ratio of two gamma functions are derived.
Guo Senlin
Qi Feng
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