Lewis-Pye, Andrew (2005) On a question of sacks: a partial solution on the positive side. In: Cooper, S. Barry, Löwe, Benedikt and Torenvliet, Leen, (eds.) New Computational Paradigms: First Conference on Computability in Europe, Cie 2005, Amsterdam, the Netherlands, June 8-12, 2005. Lecture notes in computer science (3526). Springer Berlin / Heidelberg, Berlin, pp. 275-286. ISBN 9783540261797
Full text not available from this repository.Abstract
Let us say that a c.e. operator E is degree invariant on any given Turing degree a if X,Y ∈ a → E(X) ≡ T E(Y) . In [4] we construct a c.e. operator E such that ∀X [ X < T E(X) < T X′] . While we are unable to produce degree invariance everywhere, we are able to ensure that for every degree a there exists b such that a ∨ 0′ = b ∨ 0′ and E is degree invariant on b . What appears here is an abbreviated version of the material from that paper, stopping short of most technical details.
| Item Type: | Book Section |
|---|---|
| Official URL: | http://link.springer.com/bookseries/558 |
| Additional Information: | © 2005 Springer |
| Divisions: | Mathematics |
| Subjects: | Q Science > QA Mathematics |
| Date Deposited: | 06 Aug 2013 11:16 |
| Last Modified: | 02 Jan 2024 02:06 |
| URI: | http://eprints.lse.ac.uk/id/eprint/51424 |
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