Fuzzy attribute implications: computing non-redundant bases using maximal independent sets

  • Authors:
  • Radim Bělohlávek;Vilém Vychodil

  • Affiliations:
  • Department of Computer Science, Palacký University, Olomouc, Olomouc, Czech Republic;Department of Computer Science, Palacký University, Olomouc, Olomouc, Czech Republic

  • Venue:
  • AI'05 Proceedings of the 18th Australian Joint conference on Advances in Artificial Intelligence
  • Year:
  • 2005

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Abstract

This note describes a method for computation of non-redundant bases of attribute implications from data tables with fuzzy attributes. Attribute implications are formulas describing particular dependencies of attributes in data. A non-redundant basis is a minimal set of attribute implications such that each attribute implication which is true in a given data (semantically) follows from the basis. Our bases are uniquely given by so-called systems of pseudo-intents. We reduce the problem of computing systems of pseudo-intents to the problem of computing maximal independent sets in certain graphs. We outline theoretical foundations, the algorithm, and present demonstrating examples.