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Relative enumerability in Ershov’s hierarchy

✍ Scribed by I. I. Batyrshin

Book ID
110149405
Publisher
SP MAIK Nauka/Interperiodica
Year
2008
Tongue
English
Weight
524 KB
Volume
84
Category
Article
ISSN
0001-4346

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Recursive Structures and Ershov's Hierar
Recursive Structures and Ershov's Hierarchy
✍ Christopher J. Ash; Julia F. Knight 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 460 KB

Ash and Nerode [2] gave natural definability conditions under which a relation is intrinsically r.e. Here we generalize this to arbitrary levels in Ershov's hierarchy of A: sets, giving conditions under which a relation is intrinsically a-r. e.