On the connection of hypergraph theory with formal concept analysis and rough set theory

被引:36
作者
Cattaneo, Gianpiero [1 ]
Chiaselotti, Giampiero [2 ]
Ciucci, Davide [1 ]
Gentile, Tommaso [2 ]
机构
[1] Univ Milano Bicocca, Dept Informat Syst & Commun, I-20126 Milan, Italy
[2] Univ Calabria, Dept Math & Informat, I-87036 Arcavacata Di Rende, CS, Italy
关键词
Rough sets; Formal concept analysis; Hypergraphs; CO-ENTROPY; DEPENDENCIES; PARTITIONS; COVERINGS;
D O I
10.1016/j.ins.2015.09.054
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
We present a unique framework for connecting different topics: hypergraphs from one side and Formal Concept Analysis and Rough Set Theory from the other. This is done through the formal equivalence among Boolean information tables, formal contexts and hypergraphs. Links with generic (i.e., not Boolean) information tables are established, through so-called nominal scaling. The particular case of k-uniform complete hypergraphs will then be studied. In this framework, we are able to solve typical problems of Rough Set Theory and Formal Concept Analysis using combinatorial techniques. More in detail, we will give a formula to compute the degree of dependency and the partial implication between two sets of attributes, compute the set of reducts and define the structure of the partitions generated by all the definable indiscernibility relations. (C) 2015 Elsevier Inc. All rights reserved.
引用
收藏
页码:342 / 357
页数:16
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