Generalized Ulam-Hyers Stability Results of a Quadratic Functional Equation in Felbin’s Type Fuzzy Normed Linear Spaces

Abstract

This paper presents the generalized Ulam-Hyers stability of the following quadratic functional equationF((x+y)/2 – z) + f(y+z)/2 – x) + f((z+x)/2 – y) = 3/4(f(z−x) + f(z−y) + f(x−y))in Felbin’s type fuzzy normed linear spaces (f-NLS) using direct and fixed point methods.