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The Hyers-Ulam Stability of a Functional Equation Deriving from Quadratic and Cubic Functions in Quasi-β-normed Spaces 被引量:7

The Hyers-Ulam Stability of a Functional Equation Deriving from Quadratic and Cubic Functions in Quasi-β-normed Spaces
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摘要 In this paper, we investigate the Hyers-Ulam stability of the following function equation 2f(2x + y) + 2f(2x - y) = 4f(x + y) + 4f(x - y) + 4f(2x) + f(2y) - Sf(x) - 8f(y) in quasi-β-normed spaces. In this paper, we investigate the Hyers-Ulam stability of the following function equation 2f(2x + y) + 2f(2x - y) = 4f(x + y) + 4f(x - y) + 4f(2x) + f(2y) - Sf(x) - 8f(y) in quasi-β-normed spaces.
出处 《Acta Mathematica Sinica,English Series》 SCIE CSCD 2010年第12期2335-2348,共14页 数学学报(英文版)
基金 Supported by National Science Foundation of China (Grant Nos. 10626031 and 10971117) the Scientific Research Project of the Department of Education of Shandong Province (Grant No. J08LI15)
关键词 Hyers-Ulam stability quadratic mapping cubic mapping quasi-β-normed spaces (β p)-Banach spaces Hyers-Ulam stability, quadratic mapping, cubic mapping, quasi-β-normed spaces, (β,p)-Banach spaces
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