Hyers-Ulam stability of a quadratic-additive functional equation in non-Archimedean fuzzy \varphi-۲-normed spaces

In this  work, we  introduce the following  quadratic-additive functional equation\begin{align*}&\psi\left(\sum_{a=۱}^{n}  v_{a}\right)+\sum_{a=۱}^{n}\psi\left(-v_{a}+\sum_{b=۱;a\neq b}^{n} v_{b}\right)\nonumber \\= &\left(n-۳\right) \sum_{۱\leq aquadratic-additive functional equation in non-Archimedean fuzzy \varphi-۲-normed space by utilizing two different techniques.

کلیدواژه ها:

Hyers-Ulam stability ، non-Archimedean \varphi-۲-normed space ، quadratic-additive functional equation ، Fixed point method