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A Short Cut to Deforestation
, 1993
"... Lists are often used as "glue" to connect separate parts of a program together. We propose an automatic technique for improving the efficiency of such programs, by removing many of these intermediate lists, based on a single, simple, local transformation. We have implemented the method in the Glasgo ..."
Abstract

Cited by 193 (13 self)
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Lists are often used as "glue" to connect separate parts of a program together. We propose an automatic technique for improving the efficiency of such programs, by removing many of these intermediate lists, based on a single, simple, local transformation. We have implemented the method in the Glasgow Haskell compiler.
Constructive Natural Deduction And Its "omegaSet" Interpretation
, 1990
"... . Various Theories of Types are introduced, by stressing the analogy "propositionsas types" : from propositional to higher order types (and Logic). In accordance with this, proofs are described as terms of various calculi, in particular of polymorphic (second order) l calculus. A semantic explana ..."
Abstract

Cited by 2 (1 self)
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. Various Theories of Types are introduced, by stressing the analogy "propositionsas types" : from propositional to higher order types (and Logic). In accordance with this, proofs are described as terms of various calculi, in particular of polymorphic (second order) l calculus. A semantic explanation is then given by interpreting individual types and the collection of all types in two simple categories built out of the natural numbers (the modest sets and the universe of wsets). The first part of this paper (syntax) may be viewed as a short tutorial with a constructive understanding of the deduction theorem and some work on the expressive power of first and second order quantification. Also in the second part (semantics, .67) the presentation is meant to be elementary, even though we introduce some new facts on types as quotient sets in order to interpret "explicit polymorphism". (The experienced reader in Type Theory may directly go, at first reading, to .678). Content. Remark...