1993 Volume 5 Issue 5 Pages 1142-1154,1247-
The fuzzy relation equations that were proposed by Sanchez in 1976,are very useful, when we want to deal with fuzzy relations between human behaviors and subjective evaluations. This paper presents a study on the method of finding whether or not the fuzzy relation equations have solutions. This method can be applied not only the above-mentioned fuzzy relation equations but also be extended to fuzzy relation equations such as fuzzy inequality and fuzzy relation equations whose elements are indicated by interval values between O and 1. This method consists of "the Signs Matrix Technique" that was proposed. "Signs Matrix" is the martix whose elements are a greater/less then comparison sign between 2 matrixes. This technique enables us to find the existence of solutions of extended fuzzy relation equations very easily.
