The Pure and Applied Mathematics (한국수학교육학회지시리즈B:순수및응용수학)
- Volume 14 Issue 1 Serial No. 35
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- Pages.7-14
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- 2007
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- 1226-0657(pISSN)
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- 2287-6081(eISSN)
ON THE STABILITY OF THE COSINE TYPE FUNCTIONAL EQUATION
Abstract
The aim of this paper is to study the superstability problem of the cosine type functional equation f(x+y)+f(x+