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Classes of recursively enumerable sets and Q-reducibility

✍ Scribed by R. Sh. Omanadze


Publisher
SP MAIK Nauka/Interperiodica
Year
1989
Tongue
English
Weight
205 KB
Volume
45
Category
Article
ISSN
0001-4346

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## Abstract I introduce an effective enumeration of all effective enumerations of classes of r. e. sets and define with this the index set __IE__ of injectively enumerable classes. It is easy to see that this set is βˆ‘~5~ in the Arithmetical Hierarchy and I describe a proof for the βˆ‘~5~‐hardness of