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PREUVES, PROGRAMMES et SYSTÈMES |  |
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PREUVES, PROGRAMMES et SYSTÈMES | |
| HAL: hal-00498696, version 1 |
| DOI: 10.1007/s00153-010-0186-7 |
| Detailed view |  Export this paper |
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| Archive for Mathematical Logic 49, 5 (2010) 529-554 |
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| On the form of witness terms |
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| Stefan Hetzl 1 |
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| (2010-04-26) |
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| We investigate the development of terms during cut-elimination in first-order logic and Peano arithmetic for proofs of existential formulas. The form of witness terms in cut-free proofs is characterized in terms of structured combinations of basic substitutions. Based on this result, a regular tree grammar computing witness terms is given and a class of proofs is shown to have only elementary cut-elimination. |
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| 1: | Preuves, Programmes et Systèmes (PPS) |
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CNRS : UMR7126 – Université Paris VII - Paris Diderot |
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| Subject | : | Mathematics/Logic |
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| hal-00498696, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00498696 | |
| oai:hal.archives-ouvertes.fr:hal-00498696 | |
| From: Stefan Hetzl | |
| Submitted on: Thursday, 8 July 2010 11:04:50 | |
| Updated on: Friday, 9 July 2010 12:54:29 | |
