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Stability of an AQCQ functional equation in non-Archimedean ( n , β )-normed spaces

机译:Stability of an AQCQ functional equation in non-Archimedean ( n , β )-normed spaces

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摘要

In this paper, we adopt direct method to prove the Hyers-Ulam-Rassias stability of an additivequadratic-cubic-quartic functional equation f(x+2y)+f(x−2y)=4f(x+y)+4f(x−y)−6f(x)+f(2y)+f(−2y)−4f(y)−4f(−y)$$f(x + 2y) + f(x - 2y) = 4f(x + y) + 4f(x - y) - 6f(x) + f(2y) + f( - 2y) - 4f(y) - 4f( - y)$$ in non-Archimedean ( n , β )-normed spaces.

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