ON THE STABILITY OF THE COSINE TYPE FUNCTIONAL EQUATION
On the Stability of the Cosine Type Functional Equation
한국수학교육학회지시리즈B:순수및응용수학 / Journal of the Korean Society of Mathematical Education Series B: The Pure and Applied Mathematics, (P)1226-0657; (E)2287-6081
2007, v.14 no.1, pp.7-14
Kim, Gwang-Hui
(DEPARTMENT OF MATHEMATICS, KANGNAM UNIVERSITY)
Kim, Gwang-Hui.
(2007). ON THE STABILITY OF THE COSINE TYPE FUNCTIONAL EQUATION. , 14(1), 7-14.
Abstract
The aim of this paper is to study the superstability problem of the cosine type functional equation f(x+y)+f(x+<TEX>${\sigma}y$</TEX>)=2g(x)g(y).
- keywords
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stability,
superstability,
functional equation,
sine functional equation