Yang-Hi Lee

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tributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Abstract In this paper, we investigate the stability problems for a functional equation f (ax + y) + af (x − y) − a 2 +3a 2 f (x) − a(a−1) 2 f (−x) − f (y) − af (−y) = 0 by using(More)
distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Abstract In this paper, we investigate the generalized Hyers-Ulam stability of a functional equation 1≤i,j≤n, i =j f (x i + x j) + f (x i − x j) = (n − 1) n i=1 3f (x i) + f(More)
tributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Abstract In this paper, we prove the stability in random normed spaces via fixed point method for the functional equation f ⎛ ⎝ n j=1 x j