hyers-ulam-rassias stability of a composite functional equation in various normed spaces
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in this paper, we prove the generalized hyers-ulam(or hyers-ulam-rassias ) stability of the following composite functional equation f(f(x)-f(y))=f(x+y)+f(x-y)-f(x)-f(y) in various normed spaces.
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full texthyers-ulam-rassias stability of a composite functional equation in various normed spaces
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Journal title:
bulletin of the iranian mathematical societyجلد ۳۹، شماره ۳، صفحات ۳۸۳-۴۰۳
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