Generalized Hyers-Ulam Stability of Quadratic Functional Equations: A Fixed Point Approach
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.
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| Format: | Article |
| Language: | English |
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SpringerOpen
2008-03-01
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| Series: | Fixed Point Theory and Applications |
| Online Access: | http://dx.doi.org/10.1155/2008/493751 |