Keyphrases
- logic programs
- horn clauses
- logic programming
- stable models
- answer sets
- fixpoint
- partial deduction
- np hard
- answer set programming
- background knowledge
- inductive logic programming
- deductive databases
- normal logic programs
- stable model semantics
- prolog programs
- strong equivalence
- existentially quantified
- logic program updates
- answer set programs
- computational properties
- term rewriting systems