Ronchi Della Rocca S. Paolini L., Pimentel E.

Lazy strong normalization

In Proceedings of Intersection Types and Related System. A satellite workshops of the Joint Meeting ICALP2004/LICS2004., volume to appear, page ??, 2004 Mario Coppo and Damiani Ferruccio editors.


Among all the reduction strategies for the untyped lambda-calculus, the so called lazy beta-evaluation is of particular interest due to its large applicability to functional programming languages (e.g. Haskell). This strategy reduces only redexes not inside a lambda abstraction. The lazy strongly beta-normalizing terms are the lambda-terms that don't have infinite lazy beta-reduction sequences. This paper presents a logical characterization of lazy strongly beta-normalizing terms using intersection types. This characterization, besides being interesting by itself, allows an interesting connection between call-by-name and call-by-value lambda-calculus. In fact, it turns out that the class of lazy strongly beta-normalizing terms coincides with that of call-by-value potentially valuable terms. This last class is of particular interest since it is a key notion for characterizing solvability in the call-by-value setting.


[ bib | .pdf ]

Back


This file has been generated by bibtex2html 1.43