Logical structures and genus of proofs

Annals of Pure and Applied Logic 161 (2):139-149 (2010)
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Abstract

Any arbitrarily complicated non-oriented graph, that is a graph of arbitrarily large genus, can be encoded in a cut-free proof. This unpublished result of Statman was shown in the early seventies. We provide a proof of it, and of a number of other related facts

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References found in this work

The undecidability of k-provability.Samuel R. Buss - 1991 - Annals of Pure and Applied Logic 53 (1):75-102.
Duplication of directed graphs and exponential blow up of proofs.A. Carbone - 1999 - Annals of Pure and Applied Logic 100 (1-3):1-67.
The undecidability of k-provability.Samuel Buss - 1991 - Annals of Pure and Applied Logic 53 (1):75-102.

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