… We investigate in this paper approximate operations on sets, approximate equality of sets,
and approximate inclusion of sets. The presented approach may be considered as an alternative …

… based on rough sets. Some of the toolkits, provide advanced graphical environments that
support the process of developing and validating rough set classi ers. Rough sets are applied …

… as a main tool, while rough set theory makes use of sets—lower and upper approximations.
… fuzzy set theory and rough set theory [13]. Rough set theory does not compete with fuzzy set …

… which theoretical and applicational aspects of rough set theory already find or may potentially
… before the rough set community, or for those who would like to learn about rough sets and …

… concepts of rough set theory and point out some rough set-… directions and applications based
on rough sets. In articles [… of the rough set approach and the combination of rough sets and …

… sets and rough sets. As pointed out recently by Zadeh [34], fuzzy logic has many facets: the
logical facet, the set-… formulations and interpretations of the theory of rough sets [29]. It is very …

… In this article, we present some extensions of the rough set approach and we outline a
challenge for the rough set based research. … A nonempty boundary region of a set means …

… approaches in the study of rough sets. In the constructive approach, … Different classes of
rough set algebras are obtained from … of rough set algebras are characterized by different sets of …

… rough set theory and present some recent research directions proposed by the author. Rough
set … In this section the relationship between sets, fuzzy sets and rough sets will be outlined …

… In the rough set theory, membership is not the primary concept. Rough sets represent a …
Definition of a set in the rough set theory is related to our information (knowledge) and …