Volume 14, Issue 4 Necdet Batir Sharp bounds for the psi function and harmonic numbers 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 digamma function psi functions harmonic numbers Euler's constant Gamma function inequalities Find more articles with the same subject classes 11B83 11B73