The Π20 enumeration degrees are not dense-Reference-Cited by-同舟云学术

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The Π20 enumeration degrees are not dense

Published:1996-12 Issue:4 Volume:61 Page:1364-1379
ISSN:0022-4812
Container-title:Journal of Symbolic Logic
language:en
Short-container-title:J. symb. log.

Author:

Calhoun William C.,Slaman Theodore A.

Abstract

AbstractWe show that the Π20 enumeration degrees are not dense. This answers a question posed by Cooper.

Publisher

Cambridge University Press (CUP)

Subject

Logic,Philosophy

Reference4 articles.

1. Recursively Enumerable Sets and Degrees

Cited by 13 articles. 订阅此论文施引文献订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献

1. Fragments of the theory of the enumeration degrees;Advances in Mathematics;2021-06

2. S. Barry Cooper (1943–2015);Computability;2018-06-07

3. Density of the cototal enumeration degrees;Annals of Pure and Applied Logic;2018-05

4. A NOTE ON INITIAL SEGMENTS OF THE ENUMERATION DEGREES;The Journal of Symbolic Logic;2014-06

5. Empty intervals in the enumeration degrees;Annals of Pure and Applied Logic;2012-05

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