QUADRATIC (ρ1, ρ2)-FUNCTIONAL INEQUALITY IN FUZZY NORMED SPACES.

In this paper, we introduce and solve the following quadratic (ρ1, ρ2)-functional inequality ... in fuzzy normed spaces, where ρ1 and ρ2 are fixed nonzero real numbers with ... < 1, and f (0) = 0. Using the fixed point method, we prove the Hyers-Ulam stability of the quadratic (ρ1, ρ2)- functional inequality (0.1) in fuzzy Banach spaces. [ABSTRACT FROM AUTHOR]