Volume 12, Issue 3 Il Bong Jung Eun-Young Lee Minjung Seo Hyponormality of finite rank perturbations of normal operators 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 Il Bong Jung Eun-Young Lee Minjung Seo Find more articles with the same keywords normal operator hyponormal operator finite rank perturbation invariant subspace hyperinvariant subspace Find more articles with the same subject classes 47B20 47A63 47A55 47A15