Volume 9, Issue 4 Minghua Lin Inequalities related to 2 ✕ 2 block PPT matrices 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 Minghua Lin Find more articles with the same keywords positive partial transpose inequality trace singular value Find more articles with the same subject classes 15A45 15A42 47A30