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Closure Properties of GapP and #P.

Richard Beigel
Published in: ISTCS (1997)
Keyphrases
  • closure properties
  • expressive power
  • context free grammars
  • tree automata
  • query language
  • conjunctive queries
  • structural properties
  • context free
  • databases
  • machine learning
  • context sensitive
  • regular expressions