Journal of Mathematical Inequalities · Volume 6, Issue 2 On Diaz-Metcalf and Klamkin-McLenaghan type operator inequalities 06-29 Pages 289-297 DOI 10.7153/jmi-06-29 Downloads Short PDF Full PDF PNG Authors Marek Niezgoda Keywords geometric mean of operators positive map accretive operator Diaz-Metcalf inequality Klamkin-McLenaghan inequality Subject classes 47B65 47B44 47B49