Volume 4, Issue 2 Tsuyoshi Ando Chi-Kwong Li Operator radii and unitary 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 Tsuyoshi Ando Chi-Kwong Li Find more articles with the same keywords nitary ϱ-dilation operator radius numerical radius unitary operator Find more articles with the same subject classes 47A20 47A12 15A60