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Bono, V.; Salvo, I. |
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A CuCh Interpretation of an Object-Oriented Language |
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2001 |
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Electronic Notes in Theoretical Computer Science |
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50 |
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2 |
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159-177 |
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CuCh machine extends pure lambda–calculus with algebraic data types and provides a the possibility of defining functions over the disjoint sum of algebras. We exploit such natural form of overloading to define a functional interpretation of a simple, but significant fragment of a typical object-oriented language. |
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Elsevier |
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BOTH 2001, Bohm’s theorem: applications to Computer Science Theory (Satellite Workshop of ICALP 2001) |
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yes |
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Call Number |
Sapienza @ mari @ Bono-Salvo:BOTH01 |
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72 |
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Author |
Intrigila, Benedetto; Salvo, Ivano; Sorgi, Stefano |
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A characterization of weakly Church-Rosser abstract reduction systems that are not Church-Rosser |
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Journal Article |
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2001 |
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Information and Computation |
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171 |
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2 |
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137-155 |
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Abstract |
Basic properties of rewriting systems can be stated in the framework of abstract reduction systems (ARS). Properties like confluence (or Church-Rosser, CR) and weak confluence (or weak Church-Rosser, WCR) and their relationships can be studied in this setting: as a matter of fact, well-known counterexamples to the implication WCR CR have been formulated as ARS. In this paper, starting from the observation that such counterexamples are structurally similar, we set out a graph-theoretic characterization of WCR ARS that is not CR in terms of a suitable class of reduction graphs, such that in every WCR not CR ARS, we can embed at least one element of this class. Moreover, we give a tighter characterization for a restricted class of ARS enjoying a suitable regularity condition. Finally, as a consequence of our approach, we prove some interesting results about ARS using the mathematical tools developed. In particular, we prove an extension of the Newman’s lemma and we find out conditions that, once assumed together with WCR property, ensure the unique normal form property. The Appendix treats two interesting examples, both generated by graph-rewriting rules, with specific combinatorial properties. |
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Academic Press, Inc. |
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Duluth, MN, USA |
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0890-5401 |
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yes |
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Sapienza @ mari @ Intrigila-Salvo-Sorgi:01 |
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68 |
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Della Penna, Giuseppe; Tofani, Alberto; Pecorari, Marcello; Raparelli, Orazio; Intrigila, Benedetto; Melatti, Igor; Tronci, Enrico |
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A Case Study on Automated Generation of Integration Tests |
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2006 |
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Fdl |
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278-284 |
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978-3-00-019710-9 |
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yes |
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Sapienza @ mari @ Dtprimt06 |
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27 |
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