
doi: 10.3390/math9222881
In this paper, we study the general solution of the functional equation, which is derived from additive–quartic mappings. In addition, we establish the generalized Hyers–Ulam stability of the additive–quartic functional equation in Banach spaces by using direct and fixed point methods.
Hyers–Ulam stability, QA1-939, additive–quartic functional equation, Mathematics, fixed point method
Hyers–Ulam stability, QA1-939, additive–quartic functional equation, Mathematics, fixed point method
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