Titlebook: Extensions of Logic Programming; Second International L. -H. Eriksson,L. Halln?s,P. Schroeder-Heister Conference proceedings 1992 Springer-

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,Implementing λ-calculus reduction strategies in extended logic programming languages,ted to lower-level ones by reasoning about the logic in which the descriptions are given. It also illustrates some basic methods for manipulating functional languages represented in a higher-order abstract syntax.

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Inequalities and Economic Inequality,products, conditionals, and recursive function definitions. We also partially internalize proofs for some meta-theoretic properties of Mini-ML, the most difficult of which is subject reduction..This paper is also intended to serve as a tutorial introduction to Elf, a logic programming language based on the LF Logical Framework.

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Natural semantics and some of its meta-theory in Elf,products, conditionals, and recursive function definitions. We also partially internalize proofs for some meta-theoretic properties of Mini-ML, the most difficult of which is subject reduction..This paper is also intended to serve as a tutorial introduction to Elf, a logic programming language based on the LF Logical Framework.

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membrane

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Ballerina

Open logic theories,loited to reconstruct several policies for structuring logic programs. Open theories, as well as the operators for their composition, are provided with a compositional declarative semantics defined in terms of Herbrand models, while a proof theory is given in terms of inference rules. Soundness and completeness results are stated.

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A finitary version of the calculus of partial inductive definitions,ntain logical variables that can become bound by a binding environment that is extended as the derivation is constructed. The variant with variables is essentially a generalization of the pure GCLA programming language.