## Logic Programming and Automated Reasoning: 4th International Conference, LPAR'93, St.Petersburg, Russia, July 13-20, 1993. ProceedingsLPAR is an international conference series aimed at bringing together researchers interested in logic programming and automated reasoning. The research in logic programming grew out of the research in automated reasoning in the early 1970s. Later, the implementation techniques known from logic programming were used in implementing theorem proving systems. Results from both fields applied to deductive databases. This volume contains the proceedings of LPAR '93, which was organized by the Russian Association for Logic Programming. The volume contains 35 contributed papers selected from 84 submissions, together with an invited paper by Peter Wegner entitled "Reasoning versus modeling in computer science". |

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### Contents

Entailment and Disentailment of OrderSorted Feature Constraints | 1 |

Computing Extensions of Default Logic Preliminary Report | 19 |

Prolog with Arrays and Bounded Quantifications | 28 |

Linear 01 Inequalities and Extended Clauses | 40 |

Search Space Pruning by Checking Dynamic Term Growth | 52 |

A Proof Search System for a Modal Substructural Logic Based on Labelled Deductive Systems | 64 |

Consistency Checking of Automata Functional Specifications | 76 |

Verification of Mutual Exclusion Algorithms | 86 |

Refinements and Extensions of Model Elimination | 217 |

Executable Specifications based on Dynamic Algebras | 229 |

Generic Resolution in prepositional modal systems | 241 |

Optimized Translation of Multi Modal Logic into Predicate Logic | 253 |

Default Reasoning with a Constraint Resolution Principle | 265 |

NonClausal Deductive Techniques for Computing Prime Implicants and Prime Implicates | 277 |

Unification in OrderSorted Logic With Term Declarations | 301 |

A System Based on the Inference of Type Relations | 309 |

Parsing with DCGterms | 98 |

A First Order Resolution Calculus with Symmetries | 110 |

Ordered Paramodulation and Resolution as Decision Procedure | 122 |

Static Analysis of Prolog with Cut | 134 |

A New Type Theory for Representing Logics | 146 |

Verification of SwitchLevel Designs with ManyValued Logic | 158 |

Deciding in HFSTheory via Linear Integer Programming | 170 |

The Completion of Typed Logic Programs and SLDNFResolution | 182 |

Increasing the Versatility of Heuristic Based Theorem Provers | 194 |

Sequentialization of Parallel Logic Programs with Mode Analysis | 205 |

A Comparison of Mechanisms for Avoiding Repetition of Subdeductions in Chain Format Linear Deduction Systems | 321 |

Neutralization and Preemption in Extended Logic Programs | 333 |

A System for Axiomatizing Manyvalued Logics | 345 |

A System for Programming with Proofs | 348 |

the marriage of HOL and Maple | 351 |

System Description of LAMBDALG A Higher Order Algebraic Specification Language | 354 |

Mixing metafor | 357 |

A Complete Axiom System for Isomorphism of Types in Closed Categories | 360 |

Reasoning Modeling and ComponentBased Technology | 372 |

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### Common terms and phrases

Abstract Abstract Interpretation algorithm application Artificial Intelligence atoms Automated axioms bounded quantifications C-literal c-paths calculus called clause set complete component-based Computer Science conjunction connection dag consider contains corresponding cut-free DCG-term declarations deduction systems default logic defined definition denote derivation domain equations equivalent example extended clauses FGHC first-order formula function symbols graph Herbrand universe implementation induction inequality inference input integer interpretation label Lemma linear literals Logic Pro Logic Programming many-valued many-valued logics mechanism modal logic model elimination nodes normal form obtained occurring operation OSF constraint paramodulation path Peterson's algorithm predicate logic prefix prime implicants problem procedure Prolog Prolog program proof propositional propositional logic r-expression recursive refutation relation resolution restricted result rules satisfiable semantic tree semantics sequence sequential signature simplification sort specification strategy subproof subsumption techniques term theorem proving tion tree type theory unifiable unification universal quantification University V>-term variables