The limitations of cupping in the local structure of the enumeration degrees
โ Scribed by Mariya I. Soskova
- Publisher
- Springer
- Year
- 2009
- Tongue
- English
- Weight
- 306 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0933-5846
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
We exhibit some automorphism bases for the enumeration degrees, and we derive some consequences relative to the automorphisms of the enumeration degrees.
We show that the theory of the partial ordering of the computably enumerable degrees in any given nontrivial interval is undecidable and has uncountably many 1-types.
Subrecursive degrees are partitions of computable (recursive) functions generated by strong reducibility orderings. Such reducibilities can be naturally characterized in terms of closure operations. Closure operations corresponding to standard reducibilities such as "primitive recursive," etc., are