Volume 7, Issue 1 Sungeun Jung Eungil Ko Class A operators and their extensions 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 Sungeun Jung Eungil Ko Find more articles with the same keywords class A operators subscalar operators invariant subspaces Weyl's theorem Find more articles with the same subject classes 47A11 47A15 47B20