On the Stability of the Cosine Type Functional Equation
Journal of the Korean Society of Mathematical Education Series B: Theoretical Mathematics and Pedagogical Mathematics / Journal of the Korean Society of Mathematical Education Series B: Theoretical Mathematics and Pedagogical Mathematics, (P)3059-0604; (E)3059-1309
2007, v.14 no.1, pp.7-14
Kim, Gwang-Hui
Kim,,
G.
(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