Generalized Hyers-Ulam Stability of Quadratic Functional Equations: A Fixed Point Approach
Choonkil Park
Fixed Point Theory and Applications · 2008
doi:10.1155/2008/493751 (opens in a new tab)
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Abstract
Using the fixed point method, we prove the generalized Hyers-Ulam stability of the quadratic functional equation f(2x+y)=4f(x)+f(y)+f(x+y)−f(x−y) in Banach spaces.
Abstract licence: CC BY
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