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ULAM STABILITY OF AN ADDITIVE-QUADRATIC FUNCTIONAL EQUATION IN BANACH SPACESopen access
- Authors
- Hwang, Inho; Park, Choonkil
- Issue Date
- Jun-2020
- Publisher
- ELEMENT
- Keywords
- Hyers-Ulam stability; fixed point method; additive-quadratic functional equation; direct method
- Citation
- JOURNAL OF MATHEMATICAL INEQUALITIES, v.14, no.2, pp.421 - 436
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MATHEMATICAL INEQUALITIES
- Volume
- 14
- Number
- 2
- Start Page
- 421
- End Page
- 436
- ISSN
- 1846-579X
- Abstract
- Using the fixed point method and the direct method, we prove the Hyers-Ulam stability of the following additive-quadratic functional equation f(x+y,z+w) + f(x-y,z-w) - 2f(x,z) -2f(x,w)= 0.
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