A FIXED POINT APPROACH TO THE INTUITIONISTIC FUZZY STABILITY OF QUINTIC AND SEXTIC FUNCTIONAL EQUATIONS

Publish Year: 1391
نوع سند: مقاله ژورنالی
زبان: English
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JR_IJFS-9-5_004

تاریخ نمایه سازی: 7 تیر 1401

Abstract:

The fixed point alternative methods are implemented to giveHyers-Ulam  stability for  the quintic functional equation f(x+۳y)- ۵f(x+۲y) + ۱۰ f(x+y)- ۱۰f(x)+ ۵f(x-y) - f(x-۲y) = ۱۲۰f(y) and thesextic functional equation f(x+۳y) - ۶f(x+۲y) + ۱۵ f(x+y)- ۲۰f(x)+۱۵f(x-y) - ۶f(x-۲y)+f(x-۳y) = ۷۲۰f(y)   in the setting ofintuitionistic fuzzy normed spaces (IFN-spaces).  This methodintroduces a metrical context and shows that the stability isrelated to some fixed point of a suitable operator. Furthermore, theinterdisciplinary relation among the fuzzy set theory,  the theoryof intuitionistic spaces and the theory of functional equations arealso presented in the paper.

Authors

Tian Zhou Xu

School of Mathematics, Beijing Institute of Technology, Beijing ۱۰۰۰۸۱, People's Republic of China

Matina John Rassias

Department of Statistical, University College London, Science ۱-۱۹ Torrington Place, London WC۱E ۷HB, United Kingdom

Wan Xin Xu

Department of Electrical and Computer Engineering, College of En- gineering, University of Kentucky, Lexington ۴۰۵۰۶, Usa and School of Communica- tion and Information Engineering, University of Electronic Science and Technology of China

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