... point approach to the stability of the cubic functional equation. Bol Soc Mat Mexicana12(1), 51–57 (2006). (3)8. Jung, S-M, Kim, T-S, Lee, K-S: A fixed point approach to the stability of quadratic ... reasoning of the proof of Theorem 2.3, we haveBae and Park Journal of Inequalities and Applications 2011, 2011:82http://www.journalofinequalitiesandapplications.com/content/2011/1/82Page 6 of 7for ... 10 October 2011 Published: 10 October 2011References1. Ulam, SM: A Collection of Mathematical Problems. pp. 63. Interscience Publishers, New York (1968)2. Hyers, DH: On the stability of the...