Some completely monotonic functions related to the psi function

Tomislav Burić, Neven Elezović
2011 Mathematical Inequalities & Applications  
Complete monotonicity properties of some functions involving the psi function are studied and some known results are extended and generalized. Moreover, a necessary and sufficient conditions for some functions to be completely monotonic are presented and proved. Mathematics subject classification (2010): 33B15, 26D15.
doi:10.7153/mia-14-57 fatcat:zcfvd7zazne3tchf62o7vvoazq