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On the complexity of proof deskolemization

Published online by Cambridge University Press:  12 March 2014

Matthias Baaz ,
Stefan Hetzl  and
Daniel Weller
Matthias Baaz
Affiliation:
Institute of Discrete Mathematics and Geometry (E104), Vienna University of Technology, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria, E-mail: baaz@logic.at
Stefan Hetzl
Affiliation:
Laboratoire Preuves, Programmes et Systèmes (PPS), Université Paris Diderot – Paris 7, 175 Rue du Chevaleret, 75013 Paris, France, E-mail: stefan.hetzl@pps.jussieu.fr
Daniel Weller
Affiliation:
Institute of Computer Languages (E185), Vienna University of Technology, Favoritenstraβe 9, 1040 Vienna, Austria, E-mail: weller@logic.at
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Abstract

We consider the following problem: Given a proof of the Skolemization of a formula F, what is the length of the shortest proof of F? For the restriction of this question to cut-free proofs we prove corresponding exponential upper and lower bounds.

Type
Research Article
Information
The Journal of Symbolic Logic , Volume 77 , Issue 2 , June 2012 , pp. 669 - 686
Copyright
Copyright © Association for Symbolic Logic 2012

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References

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