Banach Limit and Fixed Point Approach in the Ulam Stability of the Quadratic Functional Equation

We show how to obtain new results on the Ulam stability of the quadratic equation <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>q</mi><mo>(</mo><mi>a</mi><mo>...

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Bibliographic Details
Main Authors: El-sayed El-hady, Janusz Brzdęk
Format: Article
Language:English
Published: MDPI AG 2025-03-01
Series:Axioms
Subjects:
Online Access:https://www.mdpi.com/2075-1680/14/3/206
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