Volume 28, Issue 2 Fuad Kittaneh Ali Zamani Characterizations of wρ-Birkhoff--James orthogonality and wρ-parallelism 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 Fuad Kittaneh Ali Zamani Find more articles with the same keywords operator radius operator norm numerical radius Birkhoff--James orthogonality parallelism Find more articles with the same subject classes 46B20 47A12 47A20 47A30 47L05