Approximately Ternary Homomorphisms and Derivations on C

We investigate the stability and superstability of ternary homomorphisms between C*-ternary algebras and derivations on C*-ternary algebras, associated with the following functional equation f((x2-x1)/3)+f((x1-3x3)/3)+f((3x1+3x3-x2)/3)=f(x1)

On the Stability of a Parametric Additive Functional Equation in Quasi-Banach Spaces

We investigate the generalized Hyers-Ulam stability of the following functional equation ∑=1()=1/2[∑=1(+∑=1,≠)+(∑=1)] for a fixed positive integer with ≥2 in quasi-Banach spaces