Journal of Mathematical Inequalities · Volume 12, Issue 1 Monotonicity and sharp inequalities related to gamma function 12-01 Pages 1-22 DOI 10.7153/jmi-2018-12-01 Downloads Short PDF Full PDF PNG Authors Zhen-Hang Yang Jing-Feng Tian Keywords gamma function psi function monotonicity Subject classes 33B15 26A48 26D15