Volume 11, Issue 1 Hong Ke Du Chi-Kwong Li Kuo-Zhong Wang Yueqing Wang Ning Zuo Numerical ranges of the product of 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 Hong Ke Du Chi-Kwong Li Kuo-Zhong Wang Yueqing Wang Ning Zuo Find more articles with the same keywords numerical range product of matrices and operators Find more articles with the same subject classes 15A60 47A12