AIMS Mathematics, 2020, 5(6): 5458-5469. doi: 10.3934/math.2020350

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On approximate solution of lattice functional equations in Banach f-algebras

1 Department of Mathematics, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran
2 Faculty of Electrical and Electronics Engineering, Ulsan College, Ulsan 44919, Korea
3 Research Institute for Natural Sciences, Hanyang University, Seoul 04763, Korea

The aim of the current manuscript is to prove the Hyers-Ulam stability of supremum, infimum and multiplication preserving functional equations in Banach f -algebras. In fact, by using the direct method and the fixed point method, the Hyers-Ulam stability of the functional equations is proved.
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