Korean J. Math. Vol. 19 No. 4 (2011) pp.437-451
DOI: https://doi.org/10.11568/kjm.2011.19.4.437

ON THE STABILITY OF THE GENERALIZED QUADRATIC AND ADDITIVE FUNCTIONAL EQUATION IN RANDOM NORMED SPACES VIA FIXED POINT METHOD

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Sun Sook Jin
Yang-Hi Lee

Abstract

In this paper, we prove the stability in random normed spaces via fixed point method for the functional equation f(x+2y)−2f(x+y)+2f(x−y)−f(x−2y) = 0.



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