ADDITIVE-QUADRATIC FUNCTIONAL INEQUALITIES IN FUZZY NORMED SPACES AND STABILITY.

In this paper, we investigate the following functional inequality N (f (x - y) + f (y - z) + f (z - x) - 2[f (x) + f (y) + f (z)] - f (-x) - f (-y) - f (-z),t) ≥ N (f (x + y + z),t) and prove the generalized Hyers-Ulam stability for it in fuzzy Banach spaces. [ABSTRACT FROM AUTHOR]