Volume 9, Issue 4 Jun Ichi Fujii M. Nakamura Josip Pečarić Yuki Seo Bounds for the ratio and difference between parallel sum and series via Mond-Pečarić method 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 Jun Ichi Fujii M. Nakamura Josip Pečarić Yuki Seo Find more articles with the same keywords Kantorovich inequality Kantorovich constant operator inequality parallel sum operator connection positive linear map and Mond-Pečarić method Find more articles with the same subject classes 47A30 47A63