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Turing jumps in the Ershov hierarchyWe look at infinite levels of the Ershov hierarchy in the natural system of notation, which
Relative enumerability in Ershov's hierarchyGeneralizations to various levels of Ershov's hierarchy of the relationship between n
Turing and enumeration jumps in the Ershov hierarchyIn the article, we study the behaviour of enumeration jumps of sets of low e-degrees in the Ershov
Extending Cooper’s theorem to Δ30 Turing degrees of the Ershov hierarchy is proper. In this paper we investigate proper levels of some extensions of the Ershov
Turing Degrees in Refinements of the Arithmetical Hierarchy hierarchy exhausts arithmetical sets and contains as a small fragment finite levels of Ershov hierarchies
Relative enumerability in Ershov's hierarchyGeneralizations to various levels of Ershov's hierarchy of the relationship between n
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