Proof Nets and the Linear Substitution Calculus

  • Beniamino Accattoli
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 11187)


Since the very beginning of the theory of linear logic it is known how to represent the \(\lambda \)-calculus as linear logic proof nets. The two systems however have different granularities, in particular proof nets have an explicit notion of sharing—the exponentials—and a micro-step operational semantics, while the \(\lambda \)-calculus has no sharing and a small-step operational semantics. Here we show that the linear substitution calculus, a simple refinement of the \(\lambda \)-calculus with sharing, is isomorphic to proof nets at the operational level.

Nonetheless, two different terms with sharing can still have the same proof nets representation—a further result is the characterisation of the equality induced by proof nets over terms with sharing. Finally, such a detailed analysis of the relationship between terms and proof nets, suggests a new, abstract notion of proof net, based on rewriting considerations and not necessarily of a graphical nature.



To the reviewers, for useful comments. This work has been partially funded by the ANR JCJC grant COCA HOLA (ANR-16-CE40-004-01).


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Authors and Affiliations

  1. 1.Inria Saclay and LIX, École PolytechniquePalaiseauFrance

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