Volume 12, Issue 1 Amer Abu-Omar Pei Yuan Wu Scalar approximants of quadratic operators with applications 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 Amer Abu-Omar Pei Yuan Wu Find more articles with the same keywords numerical range quadratic operator scalar approximant Find more articles with the same subject classes 47A12 47A30 47A63