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Correction to “A Cohesive Set which is not High”

✍ Scribed by Carl Jockusch; Frank Stephan


Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
68 KB
Volume
43
Category
Article
ISSN
0044-3050

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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