stability of the quadratic functional equation

Authors

e. elqorachi

y. manar

th. m. rassias

abstract

in the present paper a solution of the generalizedquadratic functional equation$$f(kx+ y)+f(kx+sigma(y))=2k^{2}f(x)+2f(y),phantom{+} x,yin{e}$$ isgiven where $sigma$ is an involution of the normed space $e$ and$k$ is a fixed positive integer. furthermore we investigate thehyers-ulam-rassias stability of the functional equation. thehyers-ulam stability on unbounded domains is also studied.applications of the results for the asymptotic behavior of thegeneralized quadratic functional equation are provided.

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Journal title:
international journal of nonlinear analysis and applications

Publisher: semnan university

ISSN

volume 1

issue 2 2010

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