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About: Rough set     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:WikicatSystemsOfSetTheory, within Data Space : dbpedia.org associated with source document(s)

Type: Thingyago:Artifact100021939yago:Instrumentality103575240yago:Object100002684yago:PhysicalEntity100001930Electionyago:System104377057yago:Whole100003553yago:WikicatSystemsOfSetTheory New Facet based on Instances of this Class

In computer science, a rough set, first described by Polish computer scientist Zdzisław I. Pawlak, is a formal approximation of a crisp set (i.e., conventional set) in terms of a pair of sets which give the lower and the upper approximation of the original set. In the standard version of rough set theory (Pawlak 1991), the lower- and upper-approximation sets are crisp sets, but in other variations, the approximating sets may be fuzzy sets.