Mathematical Inequalities & Applications · Volume 15, Issue 1 Characterization of unitary operators by elementary operators and unitarily invariant norms 15-09 Pages 89-96 DOI 10.7153/mia-15-09 Downloads Short PDF Full PDF PNG Authors Cristian Conde Keywords unitary operators norm ideals elementary operators Corach, Porta and Recht inequality Subject classes 47A63 47L20