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1.
In this paper, the direct method and the fixed point alternative method are implemented to give Hyers-Ulam-Rassias stability
of the functional equation
6f(x + y) - 6f(x - y) + 4f(3y) = 3f(x + 2y) - 3f(x - 2y) + 9f(2y)6f(x + y) - 6f(x - y) + 4f(3y) = 3f(x + 2y) - 3f(x - 2y) + 9f(2y) 相似文献
2.
Włodzimierz Fechner 《Aequationes Mathematicae》2010,79(3):307-314
The aim of the paper is to deal with the following composite functional inequalities
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