This page shows all publications that appeared in the IASI annual research reports. Authors currently affiliated with the Institute are always listed with the full name.

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Show all publications of the year  ALL, with author Fioravanti F., in the category IASI Research Reports (or show them all):

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IASI Research Report n. 592  (Previous    Next)  

Fioravanti F., Alberto Pettorossi, Maurizio Proietti

Transformation Rules for Locally Stratified Constraint Logic Programs

ABSTRACT

We propose a set of transformation rules for constraint logic programs with negation. We assume that every program is locally stratified and, thus, it has a unique perfect model. We give sufficient conditions which ensure that the proposed set of transformation rules preserves the perfect model of the program. Our rules extend in some respects the rules for logic programs and constraint logic programs already considered in the literature and, in particular, they include a rule for unfolding a clause with respect to a negative literal.