On the Stability of Quartic Functional Equations via Fixed Point and Direct Method
نویسندگان
چکیده
The purpose of this paper is to establish the Hyers-UlamRassias stability of quartic functional equation (3 ) ( 3 ) 64 ( ) 64 ( ) 24 ( ) 6 ( ) f x y f x y f x f y f x y f x y in the setting of random normed space and intuitionistic random normed space. The stability of the equation is proved by using the fixed point method and direct method.
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