Journal of Mathematical Inequalities · Volume 3, Issue 4 A Property of a Functional Inclusion Connected with Hyers-Ulam Stability 03-57 Pages 591-598 DOI 10.7153/jmi-03-57 Downloads Short PDF Full PDF PNG Authors Dorian Popa Keywords Hyers-Ulam stability square-symmetric grupoid functional inclusion Subject classes 39B72 54C60