ADDITIVE-QUADRATIC ρ-FUNCTIONAL INEQUALITIES IN FUZZY NORMED SPACES

摘要

Let Using the fixed point method, we prove the Hyers-Ulam stability of the additive-quadratic ρ-functional inequalities N(M_1 f(x, y), t) ≥ N (ρM_2 f(x, y), t) where ρ is a fixed real number with |ρ| < 1, and N (M_2 f(x, y), t) ≥ N (ρM_1 f(x, y), t) where ρ is a fixed real number with |ρ| <1/2.