... Choonkil Park 13Remark 5.6. If the Lie products ·, · in the statements of the theorems in this section arereplaced by the Jordan products ·◦·, then one obtains Jordan derivations instead of ... AppliedMathematics, no. 8, Interscience, New York, NY, USA, 1960.2 D. H. Hyers, On the stability of the linear functional equation,” Proceedings of the National Academy of Sciences of the United ... distribution, and reproduction in any medium, provided the original work is properly cited.1. Introduction and Preliminaries The stability problem of functional equations originated from a question of...