Mathematical Inequalities & Applications · Volume 21, Issue 4 Optimal weak parallelogram constants for Lp spaces 21-71 Pages 1047-1058 DOI 10.7153/mia-2018-21-71 Downloads Short PDF Full PDF PNG Authors Raymond Cheng Javad Mashreghi William T. Ross Keywords parallelogram law Clarkson inequalities best constants Hilbert spaces Subject classes 46B25 46B20 46C15 46G12