Approximate solutions of a quadratic functional equation in 2-Banach spaces using fixed point theorem.

Autor:	Sayar, Khaled Yahya Naif, Bergam, Amal
Zdroj:	Journal of Fixed Point Theory & Applications; Mar2020, Vol. 22 Issue 1, p1-16, 16p
Abstrakt:	In this paper, we investigate some stability and hyperstability results for the following quadratic functional equation: f (x + y) + f (x - y) = 2 f (x) + 2 f (y) in 2-Banach spaces using Brzdȩk’s fixed point approach. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
Externí odkaz:	Zobrazit plný text záznamu Full text from SpringerLink