Volume 6, Issue 3 Eun-Young Lee How to compare the absolute values of operator sums and the sums of absolute values? 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 Eun-Young Lee Find more articles with the same keywords symmetric norms operator inequalities concave functions Find more articles with the same subject classes 15A60 47A30 47A60