A. Zamzamzadeh - Department of Applied Mathematics, Faculty of Sciences and Modern Technologies, Graduate University of Advanced Technology, Kerman, Iran
M. A. Yaghoobi - Department of Applied Mathematics, Faculty of Mathematics and Computer, Shahid Bahonar University of Kerman, Kerman, Iran

This paper considers a biobjective transportation problem with various fuzzy objective functions coefficients. Fuzzy coefficients can be of different types such as triangular, trapezoidal, (semi) L-R, or flat (semi) L-R fuzzy numbers. First, we convert the problem to a parametric interval biobjective transportation problem using \gamma-cuts of fuzzy coefficients. Then, we consider a fix \gamma-cut and obtain a necessarily weak efficient solution to the yielded interval biobjective program by a new algorithm. It uses basic feasible solutions and the parametric simplex algorithm. Furthermore, we suggest another algorithm for finding a reasonable solution, called \gamma^*-necessarily weak efficient, to the main biobjective transportation problem. To illustrate the validity and performance of the proposed algorithms, we present some numerical examples.

Biobjective transportation problem, inerval biobjective linear programming problem, necessarily week efficient solution, Fuzzy membership function, gamma-cut