Volume 15, Issue 2 Hosna Jafarmanesh Maryam Khosravi Sharp operator mean inequalities of the numerical radii 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 Hosna Jafarmanesh Maryam Khosravi Find more articles with the same keywords numerical radius operator norm inequality refine Find more articles with the same subject classes 47A63 47A64