Mathematical Inequalities & Applications · Volume 15, Issue 2 Oppenheim's inequality and RKHS 15-39 Pages 449-456 DOI 10.7153/mia-15-39 Downloads Short PDF Full PDF PNG Authors Akira Yamada Keywords Oppenheim's inequality Hadamard's inequality Schur's inequality Hadamard product of matrices positive semidefinite matrices reproducing kernels Subject classes 46E22 15A45