Volume 15, Issue 2 Yi-Chao Chen Toufik Mansour Qian Zou On the complete monotonicity of quotient of gamma functions 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 Yi-Chao Chen Toufik Mansour Qian Zou Find more articles with the same keywords Gamma function psi function completely monotonic function logarithmically completely monotonic function Find more articles with the same subject classes 33B15 26A48 26A51