Mathematical Inequalities & Applications · Volume 24, Issue 3 The upper boundary for the ratio between n-variable operator power means 24-52 Pages 751-757 DOI 10.7153/mia-2021-24-52 Downloads Short PDF Full PDF PNG Authors Yuki Seo Keywords operator power mean geometric operator mean Kantorovich constant a generalized condition number Karcher mean Subject classes 47A63 47A64