Studies in fuzzy groups

Makamba, B.B. (1993) Studies in fuzzy groups. PhD thesis, Rhodes University.

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In this thesis we first extend the notion of fuzzy normality to the notion of normality of a fuzzy subgroup in another fuzzy group. This leads to the study of normal series of fuzzy subgroups, and this study includes solvable and nilpotent fuzzy groups, and the fuzzy version of the Jordan-Hõlder Theorem. Furthermore we use the notion of normality to study products and direct products of fuzzy subgroups. We present a notion of fuzzy isomorphism which enables us to state and prove the three well-known isomorphism theorems and the fact that the internal direct product of two normal fuzzy subgroups is isomorphic to the external direct product of the same fuzzy subgroups. A brief discussion on fuzzy subgroups generated by fuzzy subsets is also presented, and this leads to the fuzzy version of the Basis Theorem. Finally, the notion of direct product enables us to study decomposable and indecomposable fuzzy subgroups, and this study includes the fuzzy version of the Remak-Krull-Schmidt Theorem.

Item Type:Thesis (PhD)
Uncontrolled Keywords:Fuzzy subgroup, Normal fuzzy subgroup, Level subgroup, Fuzzy isomorphism, Fuzzy point, Homomorphism, Fuzzy product, Fuzzy direct product, Solvable, Nilpotent, Fuzzy quotient
Subjects:Q Science > QA Mathematics
Divisions:Faculty > Faculty of Science > Mathematics (Pure & Applied)
Supervisors:Kotzé, W.J.
ID Code:4044
Deposited By: Philip Clarke
Deposited On:15 Nov 2012 13:07
Last Modified:15 Nov 2012 13:07
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