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Quantified Propositional Logic and the Number of Lines of Tree-like Proofs
Studia Logica: An International Journal for Symbolic Logic
Vol. 64, No. 3 (Apr., 2000), pp. 315-321
Published by: Springer
Stable URL: http://www.jstor.org/stable/20016155
Page Count: 7
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There is an exponential speed-up in the number of lines of the quantified propositional sequent calculus over Substitution Frege Systems, if one considers proofs as trees. Whether this is true also for the number of symbols, is still an open problem.
Studia Logica: An International Journal for Symbolic Logic © 2000 Springer