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Stability of the Apollonius Type Additive Functional Equation in Modular Spaces and Fuzzy Banach Spaces

Author

Listed:
  • Sang Og Kim

    (School of Data Science, Hallym University, Chuncheon 24252, Korea)

  • John Michael Rassias

    (Pedagogical Department of Education E.E., Mathematics and Informatics Section, National and Capodistrian University of Athens, 4, Agamemnonos St., Aghia Paraskevi, 15342 Athens, Greece)

Abstract

In this work, we investigate the generalized Hyers-Ulam stability of the Apollonius type additive functional equation in modular spaces with or without Δ 2 -conditions. We study the same problem in fuzzy Banach spaces and β -homogeneous Banach spaces. We show the hyperstability of the functional equation associated with the Jordan triple product in fuzzy Banach algebras. The obtained results can be applied to differential and integral equations with kernels of non-power types.

Suggested Citation

  • Sang Og Kim & John Michael Rassias, 2019. "Stability of the Apollonius Type Additive Functional Equation in Modular Spaces and Fuzzy Banach Spaces," Mathematics, MDPI, vol. 7(11), pages 1-17, November.
    • Handle: RePEc:gam:jmathe:v:7:y:2019:i:11:p:1125-:d:287852
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