A study of fuzzy sets and systems with applications to group theory and decision making

Gideon, Frednard (2006) A study of fuzzy sets and systems with applications to group theory and decision making. Masters thesis, Rhodes University.





In this study we apply the knowledge of fuzzy sets to group structures and also to decision-making implications. We study fuzzy subgroups of finite abelian groups. We set G = Z[subscript p[superscript n]] + Z[subscript q[superscript m]]. The classification of fuzzy subgroups of G using equivalence classes is introduced. First, we present equivalence relations on fuzzy subsets of X, and then extend it to the study of equivalence relations of fuzzy subgroups of a group G. This is then followed by the notion of flags and keychains projected as tools for enumerating fuzzy subgroups of G. In addition to this, we use linear ordering of the lattice of subgroups to characterize the maximal chains of G. Then we narrow the gap between group theory and decision-making using relations. Finally, a theory of the decision-making process in a fuzzy environment leads to a fuzzy version of capital budgeting. We define the goal, constraints and decision and show how they conflict with each other using membership function implications. We establish sets of intervals for projecting decision boundaries in general. We use the knowledge of triangular fuzzy numbers which are restricted field of fuzzy logic to evaluate investment projections.

Item Type:Thesis (Masters)
Additional Information:M.Sc. (Mathematics)
Uncontrolled Keywords:fuzzy logic and set, fuzzy sets, fuzzy number, equivalence relation, fuzzy subgroup, finite abelian group, equivalence class, decision-making, net present value, investment, capital budgeting
Subjects:Y Unknown > Subjects to be assigned
Divisions:Faculty > Faculty of Science > Mathematics (Pure & Applied)
Supervisors:Murali, V. (Prof.)
ID Code:269
Deposited By: Rhodes Library Archive Administrator
Deposited On:19 Jul 2006
Last Modified:06 Jan 2012 16:17
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