A View on Rough Set Concept Approximations

Issue title: The 9th International Conference on Rough Sets, Fuzzy Sets, Data Mining and Granular Conputing (RSFDGrC 2003)

Article type: Research Article

Authors: Bazan, Jan | Nguyen, Hung Son | Szczuka, Marcin

Affiliations: Institute of Mathematics, University of Rzeszów, Rejtana 16A, 35-959 Rzeszów, Poland | Institute of Informatics, University of Warsaw, ul. Banacha 2, 02-097 Warszawa, Poland

Abstract: The concept of approximation is one of the most fundamental in rough set theory. In this work we examine this basic notion as well as its extensions and modifications. The goal is to construct a parameterized approximation mechanism making it possible to develop multi-stage multi-level concept hierarchies that are capable of maintaining acceptable level of imprecision from input to output.

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Journal: Fundamenta Informaticae, vol. 59, no. 2-3, pp. 107-118, 2004