Volume 24, Issue 3 Yuki Seo The upper boundary for the ratio between n-variable operator power means 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 Yuki Seo Find more articles with the same keywords operator power mean geometric operator mean Kantorovich constant a generalized condition number Karcher mean Find more articles with the same subject classes 47A63 47A64