Solving Fuzzy Linear Systems by Using the Schur Complement when Coefficient Matrix is an M-matrix

This paper analyzes the system of equations that right-hand side is a fuzzy vector and the coefficient matrix is a crisp M-matrix. We convert the fuzzy linear system (FLS) to the equivalent crisp system with coefficient matrix of dimension 2n×2n. But solving the crisp system is difficult because of its huge dimension (2n×2n) for large n. In this paper we employ a method which scape from it, i.e. instead of computing Z-1, we compute the inverse of a matrix which is n × n.