Download A 25-Year Perspective on Logic Programming: Achievements of by Gianfranco Rossi (auth.), Agostino Dovier, Enrico Pontelli PDF

By Gianfranco Rossi (auth.), Agostino Dovier, Enrico Pontelli (eds.)

This e-book celebratesthe twenty fifth anniversaryof GULP—the Italian Associationfor LogicProgramming.Authored by means of Italian researchersat the forefront in their ?elds, it offers an updated survey of a wide choice of subject matters 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 overseas actions, together with either meetings and summer time colleges. it's been particularly energetic in assisting and inspiring younger researchers, via supplying scholarships for GULP occasions and awarding amazing disser- tions. WeintheinternationallogicprogrammingcommunitylookuponGULPwith a mixture of envy, admiration and gratitude. we're happy to wait its meetings and summer season faculties, the place we will find out about scienti?c advances, meet up with previous neighbors and meet younger scholars. it's an honour for me to recognize our appreciation to GULP for its awesome contributions to our ?eld and to precise our greatest needs for its carrying on with prosperity sooner or later. March 2010 Robert Kowalski Imperial university London Preface On June 18, 1985, a bunch of pioneering researchers, together with representatives from undefined, nationwide learn labs, and academia, attended the constituent meeting of the crowd of researchers and clients of common sense Programming (GULP) organization. That was once the start line of a protracted event in technology, 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

Example text

Thanks to the equivalence between top-down and bottom-up constructions of the concrete semantics, by using an approach analogous to that given in Section 4, it is possible to get a goal independent top-down and bottom-up construction of the abstract model. This was the leading principle in the development of the framework for bottomup abstract interpretation proposed in [3]. An instance of the framework consists in the specialization of a set of basic abstract operators like abstract unification, abstract substitution application and abstract union.

If S is correct wrt x and is compositional wrt ◦, then S is also correct wrt (x, ◦). If we are concerned with the input/output behavior of programs we should just observe computed answers. However some semantic based techniques (such as program Theoretical Foundations and Semantics of Logic Programming 19 analysis, debugging and transformation), require to observe and take into account other features of the derivation, which make visible internal computation details. In principle, one could be interested in the complete information about the SLD-derivation, namely the sequences of goals, most general unifiers and variants of clauses.

632, pp. 84–99. Springer, Heidelberg (1992) 34. : Fully abstract compositional semantics for logic programs. In: POPL 1989: Proceedings of the 16th ACM SIGPLAN-SIGACT symposium on Principles of programming languages, pp. 134–142. ACM Press, New York (1989) 35. : Proof theory and semantics of logic programs. In: Proceedings of the Fourth Annual Symposium on Logic in computer science, pp. 50–62. IEEE Press, Los Alamitos (1989) 36. : A generalized semantics for constraint logic programs. In: Proceedings of the Int’l Conference on Fifth Generation Computer Systems, pp.

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