A fixpoint semantics of Horn sentences based on substitution sets (Q1100934)
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scientific article; zbMATH DE number 4045231
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | A fixpoint semantics of Horn sentences based on substitution sets |
scientific article; zbMATH DE number 4045231 |
Statements
A fixpoint semantics of Horn sentences based on substitution sets (English)
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1987
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A denotational semantics of Horn sentences is proposed yielding the set of substitutions with which atoms are derivable by unit deduction from the Horn sentence in question. In this way a direct correspondence is obtained between the semantics and the answer sets associated with computations. This enables one to give a denotational semantics of unsatisfiable Horn sentences as well.
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logic programming
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Horn clauses
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denotational semantics
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unit deduction
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unsatisfiable Horn sentences
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