Fuzzy Sets and Systems - Special memorial volume on mathematical aspects of fuzzy set theory
Monoidal closed categories, weak topoi and generalized logics
Fuzzy Sets and Systems - Special issue on mathematical aspects of fuzzy sets
Equality relations as a basis for fuzzy control
Fuzzy Sets and Systems
Advances in the Dempster-Shafer theory of evidence
Fuzzy sets and vague environments
Fuzzy Sets and Systems - Special issue on diagnostics and control through neural interpretations of fuzzy sets
The three semantics of fuzzy sets
Fuzzy Sets and Systems - Special issue: fuzzy sets: where do we stand? Where do we go?
A comparative study of fuzzy rough sets
Fuzzy Sets and Systems
Structures in Logic and Computer Science, A Selection of Essays in Honor of Andrzej Ehrenfeucht
Fuzzy Sets and Systems
A comparative study of fuzzy sets and rough sets
Information Sciences: an International Journal
Modeling and Reasoning with Paraconsistent Rough Sets
Fundamenta Informaticae
Membership function based rough set
International Journal of Approximate Reasoning
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The category theoretic approach of Obtułowicz to Pawlak's rough sets has been reintroduced in a somewhat modified form. A generalization is rendered to this approach that has been motivated by the notion of rough membership function. Thus, a link is established between rough sets and L-fuzzy sets for some special lattices. It is shown that a notion of indistinguishability lies at the root of vagueness. This observation in turn gives a common ground to the theories of rough sets and fuzzy sets.