Volume 15, Issue 2 Marek Niezgoda Refining eigenvalue inequalities for block 2 × 2 positive semidefinite 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 Marek Niezgoda Find more articles with the same keywords majorization Hermitian matrix positive semidefinite matrix eigenvalue G-increasing function gradient Find more articles with the same subject classes 15A18 15A42 15A45 15A60