Computing premises of a minimal cover of functional dependencies is intractable

  • Authors:
  • Mikhail A. Babin;Sergei O. Kuznetsov

  • Affiliations:
  • -;-

  • Venue:
  • Discrete Applied Mathematics
  • Year:
  • 2013

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Abstract

The problem of recognizing whether a subset of attributes is a premise of a minimal cover of functional dependencies of a relation is shown to be coNP-complete. The complexity of some related decision, enumerating, and sampling problems on functional dependencies, FCA implications, and closed sets of attributes is discussed.