%0 Journal Article %T A Functional equation related to inner product spaces in non-archimedean normed spaces %A Gordji Madjid %A Khodabakhsh Razieh %A Khodaei Hamid %A Park Choonkil %J Advances in Difference Equations %D 2011 %I Springer %X In this paper, we prove the Hyers-Ulam stability of a functional equation related to inner product spaces in non-Archimedean normed spaces. 2010 Mathematics Subject Classification: Primary 46S10; 39B52; 47S10; 26E30; 12J25. %K non-Archimedean spaces %K additive and quadratic functional equation %K Hyers-Ulam stability %U http://www.advancesindifferenceequations.com/content/2011/1/37