On operations and order relations between fuzzy values
Fuzzy value is a fuzzy set on the interval [0, 1], alpha-cuts of which are closed intervals. In this note we define several operations of Fuzzy values, which will be useful in diverse fields of both theoretical and applicative aspects. Further we introduce two kinds of order relations between fuzzy values, and investigate on the least upper bound and the greatest lower bound with respect to these orders. (C) 1999 Elsevier Science B.V. All rights reserved.
operators membership functions fuzzy numbers algebra