A New Fixed Point Theorem and a New Generalized Hyers-Ulam-Rassias Stability in Incomplete Normed Spaces

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Ramezani M., EGE Ö. , De la Sen M.

MATHEMATICS, cilt.7, no.11, 2019 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 7 Konu: 11
  • Basım Tarihi: 2019
  • Doi Numarası: 10.3390/math7111117
  • Dergi Adı: MATHEMATICS


In this study, our goal is to apply a new fixed point method to prove the Hyers-Ulam-Rassias stability of a quadratic functional equation in normed spaces which are not necessarily Banach spaces. The results of the present paper improve and extend some previous results.