Fixed Points and the Stability of an AQCQ-Functional Equation in Non-Archimedean Normed Spaces

초록

Using fixed point method, we prove the generalized Hyers-Ulam stability of the following additive-quadratic-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) in non-Archimedean Banach spaces.

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