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 On the Hyers-Ulam-Rassias stability of a generalized quadratic equation Bull. Korean Math. Soc. 2001 Vol. 38, No. 2, 261-272 Kil-Woung Jun and Yang-Hi Lee Chungnam National University, Kongju National University of Education Abstract : In this paper we prove the stability of the generalized quadratic equation $f(x+y)+g(x-y)-2f(x)-2g(y)=0$ in the spirit of Hyers, Ulam and Rassias. Keywords : quadratic equation, stability of functional equation, quadratic function MSC numbers : 39B72 Downloads: Full-text PDF