Mathematical Inequalities & Applications · Volume 16, Issue 4 An additive functional inequality in matrix normed spaces 16-79 Pages 1009-1022 DOI 10.7153/mia-16-79 Downloads Short PDF Full PDF PNG Authors Choonkil Park Dong Yun Shin Jung Rye Lee Keywords Jordan-von Neumann functional equation operator space fixed point Hyers-Ulam stability additive functional inequality Subject classes 47L25 47H10 39B82 39B72 46L07 39B52 39B62