A cohesive set which is not high
✍
Carl Jockusch; Frank Stephan
📂
Article
📅
1993
🏛
John Wiley and Sons
🌐
English
⚖ 1014 KB
## Abstract We study the degrees of unsolvability of sets which are cohesive (or have weaker recursion‐theoretic “smallness” properties). We answer a question raised by the first author in 1972 by showing that there is a cohesive set __A__ whose degree a satisfies a' = 0″ and hence is not high. We