Rough set approximations in formal concept analysis
Yiyu Y. Yao, Yaohua Sophie Chen · IEEE Annual Meeting of the Fuzzy Information, 2004. Processing NAFIPS '04. · 2004
An important topic of rough set theory is the approximation of undefinable sets or concepts through definable sets. It involves the construction of a system of definable sets and the definition of approximation operators. In this paper, the notion of rough set approximations is introduced into formal concept analysis. Approximation operators are defined based on both lattice-theoretic and set-theoretic operators. The results provide a better understanding of data analysis using rough set theory and formal concept analysis.