Operators and Matrices · Volume 16, Issue 1 Buzano, Kreĭn and Cauchy-Schwarz inequalities 16-19 Pages 239-250 DOI 10.7153/oam-2022-16-19 Downloads Short PDF Full PDF PNG Authors Mohammad Sababheh Hamid Reza Moradi Zahra Heydarbeygi Keywords Buzano inequality Kreĭn inequality Cauchy-Schwarz inequality numerical radius Subject classes 47A30 46C05 15A60 47A12