Volume 4, Issue 3 Necdet Batir Very accurate approximations for the factorial function Downloads Abstract PDF Full article PDF DOI { copied = true; setTimeout(() => copied = false, 2000) })" :aria-label="copied ? 'DOI copied' : 'Copy DOI'" :title="copied ? 'Copied' : 'Copy DOI'" > Find all available articles from these authors Necdet Batir Find more articles with the same keywords Gamma function factorial function Stirling formula psi function Euler Mascheroni constant harmonic numbers inequalities digamma function Find more articles with the same subject classes 33B15 40A25 41A60 57Q55