ON CERTAIN INEQUALITY FOR THE GAMMA FUNCTION

Sun Deqi and Qiu Yusheng (P. R. China)

Received March 31, 2008

References:

[1] H. Alzer, On some inequalities for the gamma and psi functions, Math. Comp. 66 (1997), 373-389. [2] A. Elbert and A. Laforgia, On some properties of the gamma function, Proc. Amer. Math. Soc. 9 (2000), 2667-2673. [3] W. Gautschi, Some mean value inequalities for the gamma function, SIAM J. Math. Anal. 5 (1974), 282-292. [4] S.-L. Qiu and M. Vuorinen, Some properties of the gamma and psi functions with applications, Math. Comp. 250 (2004), 723-742. [5] A. W. Roberts and D. E. Varberg, Convex Function, Academic Press, New York, 1973.

Keywords and phrases: gamma function, psi function, inequalities.