By Gianfranco Rossi (auth.), Agostino Dovier, Enrico Pontelli (eds.)
This booklet celebratesthe twenty fifth anniversaryof GULP—the Italian Associationfor LogicProgramming.Authored via Italian researchersat the vanguard in their ?elds, it provides an up to date survey of a huge selection of themes in good judgment programming, making it an invaluable reference for either researchers and scholars. in the course of its 25-year life, GULP has organised a variety of nationwide and foreign actions, together with either meetings and summer season faculties. it's been in particular energetic in helping and inspiring younger researchers, by way of supplying scholarships for GULP occasions and awarding unusual disser- tions. WeintheinternationallogicprogrammingcommunitylookuponGULPwith a mix of envy, admiration and gratitude. we're happy to wait its meetings and summer season colleges, the place we will know about scienti?c advances, meet up with previous neighbors and meet younger scholars. it truly is an honour for me to recognize our appreciation to GULP for its impressive contributions to our ?eld and to specific our greatest needs for its carrying on with prosperity sooner or later. March 2010 Robert Kowalski Imperial collage London Preface On June 18, 1985, a gaggle of pioneering researchers, together with representatives from undefined, nationwide examine labs, and academia, attended the constituent meeting of the gang of researchers and clients of good judgment Programming (GULP) organization. That was once the place to begin of an extended experience in technological know-how, that 1 we're nonetheless experiencing 25 years later. This quantity celebrates this crucial event.
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Extra resources for A 25-Year Perspective on Logic Programming: Achievements of the Italian Association for Logic Programming, GULP
E. the semantics F(Ω,ca) (P ) is not fully abstract wrt ≈(Ω,ca) . The difficulty here is related to the use of clauses in the semantic domain (the full abstraction result in  was obtained using a domain not containing clauses). A semantics correct and fully abstract wrt ≈(Ω,s) . Now we consider the usual program composition ∪Ω but we will focus on successful derivations as observable. We will obtain from the general scheme a semantics F(Ω,s) (P ) is fully abstract wrt ≈(Ω,s) . According to the general construction, we have only to define a suitable equivalence ∼(Ω,s) on clauses.
Now we consider the usual program composition ∪Ω but we will focus on successful derivations as observable. We will obtain from the general scheme a semantics F(Ω,s) (P ) is fully abstract wrt ≈(Ω,s) . According to the general construction, we have only to define a suitable equivalence ∼(Ω,s) on clauses. First, note that the clause c is a tautology iff the body of c contains a copy of the head. Given I, J ∈ C, we say that I and J are subsumption equivalent iff for any c ∈ I there exists c ∈ J such that c subsumes c and vice versa.
7 A Semantic Scheme for Constraint Logic Programs The Constraint Logic Programming paradigm CLP(X ) (CLP for short) has been proposed by Jaffar and Lassez [38,37] in order to integrate a generic computational mechanism based on constraints with the logic programming framework. The benefits of such an integration are several. From a pragmatic point of view, CLP(X ) allows one to use a specific constraints domain X and a related constraint solver within the declarative paradigm of logic programming.