M. Arunkumar1, E. Sathya2, C. Devi Shyamala Mary3*, S. Hema Latha4
Author Address :
1,2Department of Mathematics, Government Arts College, Tiruvannamalai - 606 603, TamilNadu, India.
3Department of Mathematics, St.Joseph’s College of Arts and Science, Cuddalore - 607 001, TamilNadu, India.
4Department of Mathematics, Annai Veilankanni’s College of Arts and Science, Saidapet, Chennai - 600 015, TamilNadu, India.
In this paper, the authors test the generalized Ulam - Hyers stability of the additive-quadratic and cubic-quartic functional equations
f(2x)= 3f(x) + f(-x);qquad
g(2x)= 12g(x) + 4g(-x),
via Quasi-Beta Banach space and Intuitionistic fuzzy Banach space using direct and fixed point methods.
Additive functional equation, quadratic functional equation, cubic functional equation, quartic functional equation, mixed additive-quadratic functional equations, mixe
Article Info :
Received : November 01, 2017; Accepted : December 30, 2017.