Structural properties of Q -degrees of n-c. e. sets

Annals of Pure and Applied Logic 156 (1):13-20 (2008)
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Abstract

In this paper we study structural properties of n-c. e. Q-degrees. Two theorems contain results on the distribution of incomparable Q-degrees. In another theorem we prove that every incomplete Q-degree forms a minimal pair in the c. e. degrees with a Q-degree. In a further theorem it is proved that there exists a c. e. Q-degree that is not half of a minimal pair in the c. e. Q-degrees

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Citations of this work

Some structural properties of quasi-degrees.Roland Sh Omanadze - 2018 - Logic Journal of the IGPL 26 (1):191-201.

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References found in this work

Computably enumerable sets and quasi-reducibility.R. Downey, G. LaForte & A. Nies - 1998 - Annals of Pure and Applied Logic 95 (1-3):1-35.
Weakly semirecursive sets.Carl G. Jockusch & James C. Owings - 1990 - Journal of Symbolic Logic 55 (2):637-644.
Quasicreative Sets.J. R. Shoenfield - 1960 - Journal of Symbolic Logic 25 (2):166-166.

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