General Cubic-Quartic Functional Equation

Cubic-Quartic Functional Equation

and Applied Analysis 3 In 2008, Gordji et al. 17 provided the solution as well as the stability of a mixed type cubic-quartic functional equation. We only mention here the papers 19, 32, 33 concerning the stability of the mixed type functional equations. In this paper, we deal with the following general cubic-quartic functional equation: f ( x ky ) f ( x − ky) k2(f(x y) f(x − y)) 2 ( 1 − k2 ) f...

Cubic-quartic functional equations in fuzzy normed spaces

In this paper, we investigate the generalizedHyers--Ulam stability of the functional equation

Intuitionistic fuzzy stability of a quadratic and quartic functional equation

In this paper, we prove the generalized Hyers--Ulamstability of a quadratic and quartic functional equation inintuitionistic fuzzy Banach spaces.

cubic-quartic functional equations in fuzzy normed spaces

in this paper, we investigate the generalizedhyers--ulam stability of the functional equation

On the Stability of the Orthogonally Quartic Functional Equation