A system of interaction and structure IV: The exponentials and decomposition

  • Authors:
  • Lutz Straß Burger;Alessio Guglielmi

  • Affiliations:
  • INRIA Saclay--Île-de-France and École Polytechnique, France;University of Bath and INRIA Nancy--Grand Est, United Kingdom

  • Venue:
  • ACM Transactions on Computational Logic (TOCL)
  • Year:
  • 2011

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Abstract

We study a system, called NEL, which is the mixed commutative/noncommutative linear logic BV augmented with linear logic's exponentials. Equivalently, NEL is MELL augmented with the noncommutative self-dual connective seq. In this article, we show a basic compositionality property of NEL, which we call decomposition. This result leads to a cut-elimination theorem, which is proved in the next article of this series. To control the induction measure for the theorem, we rely on a novel technique that extracts from NEL proofs the structure of exponentials, into what we call !-?-Flow-Graphs.