Khaled Y. N. Sayar, Amal Bergam

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In this paper, we prove a new type of stability and hyperstability results for
the following cubic functional equation

f (2x + y) + f (2x - y) = 2f (x + y) + 2f (x - y) + 12f(x)

in 2-Banach spaces using fixed point approach.


stability, hyperstability, fixed point, 2-Banach spaces, cubic functional equation.

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DOI: https://doi.org/10.22190/FUMI210426017S


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