Deduction Graphs with Universal Quantification

  • Authors:
  • Herman Geuvers;Iris Loeb

  • Affiliations:
  • Institute for Computing and Information Sciences, Radboud University Nijmegen, The Netherlands;Department of Mathematics and Statistics, University of Canterbury, New Zealand

  • Venue:
  • Electronic Notes in Theoretical Computer Science (ENTCS)
  • Year:
  • 2008

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Abstract

Deduction Graphs are meant to generalise both Gentzen-Prawitz style natural deductions and Fitch style flag deductions. They have the structure of acyclic directed graphs with boxes. In [Herman Geuvers and Iris Loeb. Natural Deduction via Graphs: Formal Definition and Computation Rules. Mathematical Structures in Computer Science (Special Issue on Theory and Applications of Term Graph Rewriting), Volume 17(03):485-526, 2007.] we have investigated the deduction graphs for minimal proposition logic. This paper studies the extension with first-order universal quantification, showing the robustness of the concept of deduction graphs.