On the Ulam Stability of Cauchy Functional Equation in IFN-Spaces

On the Ulam Stability of Cauchy Functional Equation in IFN-Spaces

The aim of this paper is to establish some stability results concerning the Cauchy functional equation f (x+y) = f (x)+ f (y) in the framework of intuitionistic fuzzy normed spaces.

Generalized Hyers-Ulam Stability of the Pexiderized Cauchy Functional Equation in Non-Archimedean Spaces

The stability problem of functional equations was originated from a question of Ulam 1 concerning the stability of group homomorphisms. Let G1 be a group and let G2 be a metric group with the metric d ·, · . Given > 0, does there exist a δ > 0 such that, if a function h : G1 → G2 satisfies the inequality d h xy , h x h y < δ for all x, y ∈ G1, then there exists a homomorphism H : G1 → G2 with d...

Hyers-Ulam Stability of Fibonacci Functional Equation

Hyers-Ulam-Rassias stability of a composite functional equation in various normed spaces

In this paper, we prove the generalized Hyers-Ulam(or Hyers-Ulam-Rassias ) stability of the following composite functional equation f(f(x)-f(y))=f(x+y)+f(x-y)-f(x)-f(y) in various normed spaces.

Stability of Cauchy Additive Functional Equation in Fuzzy Banach Spaces

In this article, we prove the generalized Hyers–Ulam stability of the following Cauchy additive functional equation