Testing logic programs for local stratification (Q1199536)

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scientific article; zbMATH DE number 94459
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English
Testing logic programs for local stratification
scientific article; zbMATH DE number 94459

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    Testing logic programs for local stratification (English)
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    16 January 1993
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    Locally stratified programs are a significant class of logic programs with negation for which both declarative and fixpoint semantics are well defined. Unfortunately in most cases recognizing local stratification is so hard a task that it has been conjectured that the problem is undecidable. Indeed, a formal proof of this undecidability is presented and rather general sufficient conditions for local stratification are introduced. The sufficient conditions are based on an analysis of unification patterns based on a suitably defined algebra of terms.
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    logic programs with negation
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    analysis of unification patterns
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    algebra of terms
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