Proof nets for first-order additive linear logic

Willem Heijltjes, Dominic Hughes, Lutz Strassburger

Research output: Chapter or section in a book/report/conference proceedingChapter in a published conference proceeding

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We present canonical proof nets for first-order additive linear logic, the fragment of linear logic with sum, product, and first-order universal and existential quantification. We present two versions of our proof nets. One, witness nets, retains explicit witnessing information to existential quantification. For the other, unification nets, this information is absent but can be reconstructed through unification. Unification nets embody a central contribution of the paper: first-order witness information can be left implicit, and reconstructed as needed. Witness nets are canonical for first-order additive sequent calculus. Unification nets in addition factor out any inessential choice for existential witnesses. Both notions of proof net are defined through coalescence, an additive counterpart to multiplicative contractibility, and for witness nets an additional geometric correctness criterion is provided. Both capture sequent calculus cut-elimination as a one-step global composition operation.
Original languageEnglish
Title of host publicationFourth International Conference on Formal Structures for Computation and Deduction (FSCD 2019)
EditorsHerman Geuvers, Herman Geuvers
PublisherSchloss Dagstuhl- Leibniz-Zentrum fur Informatik GmbH, Dagstuhl Publishing
Number of pages22
ISBN (Electronic)9783959771078
ISBN (Print)978-3-95977-107-8
Publication statusPublished - 18 Jun 2019
EventFourth International Conference on Formal Structures for Computation and Deduction - Dortmund, Germany
Duration: 24 Jun 201930 Jun 2019

Publication series

NameLeibnitz International Proceedings in Informatics
PublisherSchloss-Dagstuhl - Leibniz-Zentrum fuer Informatik
ISSN (Electronic)1868-8969


ConferenceFourth International Conference on Formal Structures for Computation and Deduction
Abbreviated titleFSCD 2019
Internet address


  • First-order logic
  • Herbrand’s theorem
  • Linear logic
  • Proof nets

ASJC Scopus subject areas

  • Software


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