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Abstract There are large a number of real world problems that can be cast in a form of multiobjective uncertainty programming problem. A signi cant outcome of this thesis is the investigation of the problem by incorporating fuzzy numbers and fuzzy rough numbers into a multiobjective linear and non linear programming framework. Inspired by the techniques, see [26, 34, 38, 49], we characterized the solution for this problem via the concepts of fuzzy rough e ciency. The general purpose of this research is to investigate how to solve (MOP) problems with uncertainty coecients. The target behind this research is to introduce:. |