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Paper   IPM / M / 8565
School of Mathematics
  Title:   Stability of linear mappings in quasi-banach modules
  Author(s):  M. . Sal Moslehian (Joint with Gh. Sadeghi)
  Status:   Published
  Journal: Math. Ineq. Appl.
  Vol.:  11
  Year:  2008
  Pages:   549-557
  Supported by:  IPM
A quasi norm is a non-negative function ||.|| on a linear space X satisfying the same axioms as a norm except for the triangle inequality, which is replaced by the weaker condition that "there is a constant K ≥ 1 such that ||x+y|| ≤ K(||x|| + ||y||) for all x, yX". In this paper, we prove the Hyers-Ulam-Rassias stability of linear mappings in quasi-Banach modules associated to the Cauchy functional equation and a generalized Jensen functional equation.

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