On Generalizing Pawlak Approximation Operators (1998)

 

 

Rough Sets and Current Trends in Computing, Proceedings of the First International Conference, RSCTC'98

 

This paper reviews and discusses generalizations of Pawlak rough set approximation operators in mathematical systems, such as topological spaces, closure systems, lattices, and posets. The structures of generalized approximation spaces and the properties of approximation operators are analyzed. In the development of the theory of rough sets, approximation operators are typically defined by using equivalence relations [10, 11]. Researchers have proposed many generalized notions of approximation operators [2, 12, 15, 17, 19, 20]. Based on the results of these studies, we review and discuss generalizations of Pawlak rough set approximation operators, and show their connections with other mathematical systems. [via]
http://www2.cs.uregina.ca/~yyao/rough_set_pap...

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