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On the stability of a mixed functional equation deriving from additive, quadratic and cubic mappings

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Abstract

In this paper, we investigate the general solution and the Hyers-Ulam stability of the following mixed functional equation

$f(2x + y) + f(2x - y) = 2f(2x) + 2f(x + y) + 2f(x - y) - 4f(x) - f(y) - f( - y)$

deriving from additive, quadratic and cubic mappings on Banach spaces.

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Correspondence to Li Guang Wang or Kun Peng Xu.

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Supported by National Natural Science Foundation of China (Grant No. 11371222), Natural Science Foundation of Shandong Province (Grant No. ZR2012AM024) and China Scholarship Council

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Wang, L.G., Xu, K.P. & Liu, Q.W. On the stability of a mixed functional equation deriving from additive, quadratic and cubic mappings. Acta. Math. Sin.-English Ser. 30, 1033–1049 (2014). https://doi.org/10.1007/s10114-014-3335-9

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  • DOI: https://doi.org/10.1007/s10114-014-3335-9

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