Modalities

Abstract

Hedges play an important role in fuzzy theory, although there are relatively few articles on them. Our aim is to provide a theoretical basis not only for hedges, but also for every type of unary operator. One of them is the negation operator, which was presented in an article [14] concerning the DeMorgan class. In our study we will develop unary operators related to other binary operators by demanding that they satisfy certain properties. © 2011 Springer-Verlag Berlin Heidelberg.