On the Hyers-Ulam-Rassias Stability of the Bi-Jensen Functional Equation

  • Received : 2007.07.02
  • Published : 2008.12.31


In this paper, we obtain the Hyers-Ulam-Rassias stability of a bi-Jensen functional equation $4f(\frac {x+y}{2},\;\frac {z+w}{2})=f(x,z)+f(x,w)+f(y,z)+f(y,w)$.


Hyers-Ulam-Rassias stability;bi-Jensen mapping;functional equation


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