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http://dx.doi.org/10.7858/eamj.2019.044

A FIXED POINT APPROACH TO THE STABILITY OF A QUADRATIC-CUBIC-QUARTIC FUNCTIONAL EQUATION  

Lee, Yang-Hi (Department of Mathematics Education, Gongju National University of Education)
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Abstract
In this paper, we investigate the stability problems for a functional equation f(x + 2y)+f(x - 2y) - 4f(x + y) - 4f(x - y) + 6f(x) - 2f(2y) + 12f(y) - 4f(-y) = 0 by using the fixed point theory in the sense of L. C˘adariu and V. Radu.
Keywords
stability; quadratic-cubic-quartic mapping; quadratic-cubicquartic functional equation;
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