Abstract

In this paper, we determine some stability results concerning the cubic functional equation kf(x + ky) + f(kx y) = k(k 2 + 1) 2 (f(x + y) + f(x y)) + (k 4 1)f(y), where k � 2 is a fixed integer, in the setting of intuitionistic fuzzy normed spaces (IFNS). Further we study the intuitionistic fuzzy continuity through the existence of a certain solution of a fuzzy stability proble m for approximately cubic functional equation.

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