Properties of functional-dependency families

  title={Properties of functional-dependency families},
  author={Seymour Ginsburg and Sami Mohammed Zaiddan},
  journal={J. ACM},
A functional-dependency (FD-) family Is defined here as the family of all instances satisfying a set of functional dependencies These families are studied with respect to projection, join, and decomposition and their connection with generating families and generators Typical results obtained are (0 a charactenzauon for when the projection of an FD-family is an FD-family; 00 a charactenzauon for when the join of two FD-famihes is an FD-famdy, (m) a necessary and sufficient condition for an F D… CONTINUE READING
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