Permitting, forcing, and copying of a given recursive relation (Q1365246)
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scientific article; zbMATH DE number 1054202
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Permitting, forcing, and copying of a given recursive relation |
scientific article; zbMATH DE number 1054202 |
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Permitting, forcing, and copying of a given recursive relation (English)
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14 October 1997
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Let \(\mathcal A\) be a recursive structure for a language \(L\) and \(R\) be a relation on \(\mathcal A\). The authors give conditions under which this relation can be made \(\alpha\)-r.e. in Ershov's hierarchy of \(\Delta^0_2\)-sets in an appropriate recursive copy of \(\mathcal A\).
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recursive structure
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Ershov's hierarchy
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forcing
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permitting
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