Kreuzer, Alexander P.
:
Proof mining and combinatorics :
Program extraction for Ramsey's theorem for pairs.
TU Darmstadt
[Ph.D. Thesis], (2012)
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| Item Type: | Ph.D. Thesis | ||||
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| Title: | Proof mining and combinatorics : Program extraction for Ramsey's theorem for pairs | ||||
| Language: | English | ||||
| Abstract: | In this thesis we give a proof-theoretic account of the strength of Ramsey's theorem for pairs and related principles. We develop a method to extract programs from proofs using this theorem. Moreover, we consider the strength of different variants of the Bolzano-Weierstraß principle. We show that Ramsey's theorem for pairs implies a variant of the Bolzano-Weierstraß principle and, hence, show that our program extraction method is applicable to proofs using this principle. Also, we develop a method to extract programs from proofs that use non-principal ultrafilters and along with this we obtain a conservation result for the statement that a non-principal ultrafilter exists. This method is based on the techniques we developed for Ramsey's theorem for pairs. |
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| Uncontrolled Keywords: | proof-mining, proof-theory, Ramsey's theorem for pairs, ultrafilters, Bolzano-Weierstrass, weak compactness, cohesive principle, chain antichain principle, functional interpretation, bar recursion | ||||
| Classification DDC: | 500 Naturwissenschaften und Mathematik > 510 Mathematik | ||||
| Divisions: | Fachbereich Mathematik Fachbereich Mathematik > Logik |
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| Date Deposited: | 24 May 2012 09:37 | ||||
| Last Modified: | 07 Dec 2012 12:04 | ||||
| Related URLs: | |||||
| URN: | urn:nbn:de:tuda-tuprints-29720 | ||||
| License: | Simple publication rights for ULB | ||||
| Referees: | Kohlenbach, Prof. Dr. Ulrich and Avigad, Prof. PhD Jeremy and Martin, Prof. Dr. Ziegler | ||||
| Refereed: | 13 April 2012 | ||||
| URI: | http://tuprints.ulb.tu-darmstadt.de/id/eprint/2972 | ||||
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