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Rough orders and rough concepts. (English) Zbl 0676.06013

Summary: The paper presents a generalized approach to the notion of roughness. The concept of rough order is defined and analyzed in terms of orders, lattices and pre-closures (generalized approximation operators). It is shown that Pawlak’s theory of rough sets can be regarded as a special case of the theory of rough orders and that Wille’s analysis of conceptual contexts can be “embedded” in the rough order scheme so that a notion of rough concept can be introduced and investigated.

MSC:

06A99 Ordered sets
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