2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/222289In this paper we investigate the generalized Hyers- Ulam stability of the functional equation $$f (2x +y)+f (2x -y)= f (x + y)+ f (x -y)+2f (2x)-2f (x)$$ in fuzzy Banach spaces.14 pagesFunctional Analysis46S40text