Titlebook: Rewriting Techniques and Applications; 4th International Co Ronald V. Book Conference proceedings 1991 Springer-Verlag Berlin Heidelberg 19

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Aart Middeldorp,Yoshihito Toyamag together in the classroom, measuring neutral or positive effects on learning and the usefulness of introducing mobile devices, group support applications, and context awareness. The ratio of unwanted interruptions to users made by the system is used to evaluate the utility of the system. Results s

heterogeneous

Françoise Bellegardeain concepts of “cooperative world” which are Actors, Roles, Groups, Tasks, Processes, Artefacts (Tools and Objects) and Contexts (Platforms, Situations and Users). With Orchestra formalism we try to express by a sort of music staff individual and collective behaviours. In this way we can model eith

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0302-9743 Italy, April 10-12, 1991. The volume includes 40 papers on a wide variety of topics including: term rewriting systems, equational unification, algebraic rewriting, termination proofs, generalization problems, undecidable properties, parametrized specifications, normalizing systems, program transfor

Awning

Rewriting, and equational unification: the higher-order cases,epts. As examples, we generalize Plotkin‘s criteria for building-in equational theories, and show that pure third-order equational matching is undecidable. This approach simplifies computations in applications involving lexical scoping, and equations. We discuss open problems and summarize future research directions.

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Detecting redundant narrowing derivations by the LSE-SL reducibility test,troduce a new narrowing strategy, LSE-SL left-to-right basic normal narrowing, prove its completeness for arbitrary canonical term rewriting systems, and demonstrate how it increases the efficiency of the narrowing process.

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Narrowing directed by a graph of terms,solved, which helps one to know the narrowing derivations possibly leading to solutions. Thus, the other derivations are not computed. This method is proved complete. An example is given and some improvements are proposed.

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