On Ulam Stability of Functional Equations in 2-Normed Spaces—A Survey II

Ulam stability is motivated by the following issue: how much an approximate solution of an equation differs from the exact solutions to the equation. It is connected to some other areas of investigation, e.g., optimization, approximation theory and shadowing. In this paper, we present and discuss th...

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Bibliographic Details
Main Authors: El-sayed El-hady, Janusz Brzdęk
Format: Article
Language:English
Published: MDPI AG 2022-07-01
Series:Symmetry
Subjects:
Online Access:https://www.mdpi.com/2073-8994/14/7/1365