Volume 1, Issue 3 Masatoshi Fujii Eizaburo Kamei Ritsuo Nakamoto Grand Furuta inequality and its variant 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 Masatoshi Fujii Eizaburo Kamei Ritsuo Nakamoto Find more articles with the same keywords positive operators operator mean Löwner-Heinz inequality Furuta inequality grand Furuta inequality Find more articles with the same subject classes 47A63 47A64