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A completeness result for λµ

By Phillipe Audebaud and Steffen Bakel

Abstract

We study the expressivity of Parigot’s λµ-calculus, and show that each statement Γ ⊢ LK ∆ that is provable in Gentzen’s LK has a proof in λµ. This result is obtained through defining an interpretation from nets from the X-calculus into both the λ-calculus and λµ; X enjoys the full Curry-Howard isomorphism for (the implicative fragment of) LK, and cut-elimination in LK is represented by reduction in X. This interpretation will be shown to preserve reduction in X via equality in the target calculi, and to preserve typeability using the standard double negation translation technique of types. Using the fact that, in λµ, we can inhabit ¬¬A→A for all types A, a completeness result as well as a consistency result are shown for λµ.

Year: 2009
OAI identifier: oai:CiteSeerX.psu:10.1.1.135.7755
Provided by: CiteSeerX
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