Generalized domination in closure systems

  • Authors:
  • Anne Berry;Eric SanJuan;Alain Sigayret

  • Affiliations:
  • LIMOS (CNRS UMR), Université Blaise Pascal, Ensemble Scientifique des Cézeaux, Aubiàre cedex, France;LITA (EA), Université Paul Verlaine de Metz, Ile du Saulcy, Metz cedex, France;LIMOS, Université Blaise Pascal, Ensemble Scientifique des Cézeaux, Aubiàre cedex, France

  • Venue:
  • Discrete Applied Mathematics - Special issue: Discrete mathematics & data mining II (DM & DM II)
  • Year:
  • 2006

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Abstract

In the context of extracting maximal item sets and association rules from a binary data base, the graph-theoretic notion of domination was recently used to characterize the neighborhood of a concept in the corresponding lattice.In this paper, we show that the notion of domination can in fact be extended to any closure operator on a finite universe and be efficiently encoded into propositional Horn functions. This generalization enables us to endow notions and algorithms related to Formal Concept Analysis with Horn minimization and minimal covers of functional dependencies in Relational Databases.