The theme of this book is fuzzy logic in a narrow sense, a promising new chapter of formal logic. The basic ideas of formal logic were formulated by Lotfi Zadeh in 1975. The aim of this logic is to… Expand

We ”soften” the unification process by admitting that two first order expressions can be ”similar” up to a certain degree and not necessarly identical.Expand

This led several authors to investigate the closure systems and the closure operators in the framework of fuzzy set theory. The resulting researches give an elegant and powerful treatment of notions… Expand

Whitehead, in his famous book Process and Reality, proposed a definition of point assuming the concepts of "region" and "connection relation" as primitive.Expand

In this paper we propose a general approach to the theory of fuzzy algebras, while the early existing papers deal with a particular type of fuzzy structures as fuzzy groups, fuzzy ideals, fuzzy… Expand

Abstract We introduce and study almost compactness for fuzzy topological spaces. We show that the almost continuous image of an almost compact fuzzy topological space is almost compact. Moreover, we… Expand

M. Ying proposed a propositional calculus in which the reasoning may be approximate by allowing the antecedent clause of a rule to match its premise only approximately. The aim of this note is to… Expand