Guarded Horn Clauses (Logic Programming Series)

Guarded Horn Clauses (Logic Programming Series) by Kazunori Ueda Download PDF EPUB FB2

Finally, he proposed Guarded Horn Clauses (GHC) [22, 24]. Koichi Furukawa During the project, we succeeded in developing a concurrent logic programming language called Guarded Horn Clauses (GHC), and have been developing our final target parallel computer, the Parallel Inference Machine (PIM).

Cite this paper as: Ueda K. () Guarded horn clauses. In: Wada E. (eds) Logic Programming ' LP Lecture Notes in Computer Science, vol Cited by: CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): This paper denes a parallel logic programming language called Guarded Horn Clauses (GHC), introducing the ideas that went into the design of the language.

It also points out that GHC can be viewed as a process description language in which input and output can be described naturally by treating the outside world as a. A Horn clause is a logic disjunction Guarded Horn Clauses book literals, where at most one of the literals is positive, and all the others are is named after Alfred Horn who described them in an article in A Horn clause with exactly one positive literal is a definite clause; a definite clause with no negative literals is sometimes called a “fact”; and a Horn clause without a positive literal.

Horn clauses play a basic role in constructive logic and computational logic. They are important in automated theorem proving by first-order resolution, because the resolvent of two Horn clauses is itself a Horn clause, and the resolvent of a goal clause and a definite clause is a goal clause.

These properties of Horn clauses can lead to. Introduction to Guarded Horn Clauses By Kazunori UEDA* October Last modi cation: November ABSTRACT This paper informally introduces a programming language Guarded Horn Clauses (GHC) through program examples.

GHC is a paral-lel programming language devised from investigation of the basic framework and practice of logic programming. GUARDED HORN CLAUSES Kazunori Ueda C&C Systems Research Laboratories, NEC Corporation*Miyazaki 4-chome, Miyamae-ku, Kawasaki, Kanagawa Japan June Revised: December ** Modi ed: November *** Abstract.

A set of Horn clauses augmented with a ‘guard’ mechanism is shown to be a simple and yet powerful parallel logic. Guarded Horn Clauses (GHC)は、年末に設計され年に発表された並行論理プログラミング言語である 。 第五世代コンピュータプロジェクトで並列マシンの核言語の検討をしていた上田和紀により設計された。核言語の候補だったConcurrent Prologを分析する過程で問題点を見付け、それを解決する パラダイム: 並行論理プログラミング.

title = "guarded horn clauses and experiences with parallel logic programming.", abstract = "An overview is presented of the various activities of ICOT related to guarded Horn clauses (GHC).

A description is presented of the GHC parallel logic language first proposed by K. Ueda ().Cited by: Guarded clauses, defined by de Nivelle in, are a generalization of guarded formulas in clausal form. In, it is shown that the class of guarded clause sets is decidable by saturation under ordered resolution.

In this work, we deal with guarded clauses that are Horn by: 1. Guarded clauses, defined by de Nivelle in [7], are a generalization of guarded formulas in clausal form. In [7], it is shown that the class of guarded clause sets is decidable by saturation under Author: Michael Dierkes.

The name "Horn Clause" comes from the logician Alfred Horn, who first pointed out the significance of such clauses inin the article "On sentences which are true of direct unions of algebras", Journal of Symbolic Logic, 16, A definite clause is a Horn clause that has exactly one positive literal.

Logic programming is a programming paradigm which is largely based on formal program written in a logic programming language is a set of sentences in logical form, expressing facts and rules about some problem domain. Major logic programming language families include Prolog, answer set programming (ASP) and all of these languages, rules are written in the form of clauses.

of Guarded Horn Clauses. Most of what is said about the application of GHC also applies to the other languages in this class. For many people, Logic programming means programming in sequential Prolog. The reason for this is, of course, that Prolog is the only logic programming language available to.

Horn clauses In this subsection we introduce a special class of formulae which are of particular interest for logic programming. Furthermore it turns out that these formulae admit an efficient test for satisfiability.

transformations of Horn clauses with constraints, also called Constrained Horn Clauses. The approach is to a large extent parametric with respect to the programming language and allows us to exploit the very effective techniques and tools that have been developed in the fields of logic programming and constraint solving.

Today's high-speed network allows sophisticated applications of overlay networks. Meanwhile, usage of multicore processors has been spreading.

The level of concurrency we need to handle has been rising rapidly, which necessitates a language that can express massive concurrency in a natural way, which can work with both tightly and loosely-coupled multiprocessor environments.

A Horn theory is a set of Horn clauses. First-order clauses of this form were first introduced by J.C.C. McKinsey in in the context of decision problems. Their name, Horn clauses, alludes to a paper by A.

Horn, who in was the first to point out some of their algebraic properties. Guarded Horn Clauses was born from the examination of existing logic programming languages and logic programming in general, with special attention paid to parallelism.

View Show abstract. Graph-Based Proof Procedures for Horn Clauses Softcover reprint of the original 1st ed. Edition by. Raatz (Author) ISBN ISBN Why is ISBN important.

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Cited by: 2. Buy Guarded horn clauses: A parallel logic programming language with the concept of a guard (Technical report. Institute for New Generation Computing Technology) by Ueda, Kazunori (ISBN:) from Amazon's Book Store.

Everyday low prices and free delivery on eligible : Kazunori Ueda.Horn clauses • A literal is an atomic formula or its negation • A clause is a disjunction of literals • A Horn clause is a clause with exactly one positive literal • A Horn formula is a conjunctive normal form formula whose clauses are all Horn.At the needs of my HW at uni I need to transform some Horn clauses to Prolog but I cannot figure out how to do it.

I found out some guides but they describe how to do it with only one fact. So can.