Shahrood University of Technology Journal of Algebraic Systems 2345-5128 4 2 2017 01 01 FUZZY OBSTINATE IDEALS IN MV-ALGEBRAS 97 101 851 10.22044/jas.2017.851 EN F. Forouzesh Faculty of Mathematics and Computing, Higher Education Complex of Bam, Ker- man, Iran Journal Article 2015 04 23 In this paper, we introduce the notion of fuzzy obstinate ideals in MV -algebras. Some properties of fuzzy obstinate<br />ideals are given. Not only we give some characterizations of fuzzy obstinate ideals, but also bring the extension theorem of fuzzy obstinate ideal of an MV -algebra A. We investigate the relationships between fuzzy obstinate ideals and the other fuzzy ideals of an MV -algebra. We describe the transfer principle for fuzzy obstinate ideals in terms of level subsets. In addition, we show that if <em>Μ </em>is a fuzzy obstinate ideal of A such that <em>M</em>(0) 2 [0; 1=2], then A=<em>Μ </em>is a Boolean algebra. Finally, we define the notion of a normal fuzzy obstinate ideal and investigate some of its properties. https://jas.shahroodut.ac.ir/article_851_08ccea2270f1cc3558fbf666ad8998c9.pdf