Document Type : Research Paper


1 Faculty of Mathematics, University of Sistan and Baluchestan, Za- hedan, Iran

2 Faculty of Mathematics, University of Sistan and Baluches- tan, Zahedan, Iran


Bilevel linear programming  is a decision making problem with a two-level decentralized organization. The \textquotedblleft leader\textquotedblright~ is in the upper level and the \textquotedblleft follower\textquotedblright, in the lower. Making a decision at one level affects that at the other one. In this paper, bilevel linear programming  with inexact parameters has been studied and a method is proposed to solve a fuzzy bilevel linear programming  using  interval bilevel linear programming.


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