Journal of Mathematical Inequalities · Volume 4, Issue 3 Very accurate approximations for the factorial function 04-30 Pages 335-344 DOI 10.7153/jmi-04-30 Downloads Short PDF Full PDF PNG Authors Necdet Batir Keywords gamma function factorial function Stirling formula psi function Euler Mascheroni constant harmonic numbers inequalities digamma function Subject classes 33B15 40A25 41A60 57Q55