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Computable numberings of families of low sets and Turing jumps in the Ershov hierarchy
Faizrahmanov M.
belonging to a fixed level of the Ershov hierarchy, and we deduce existence of a Σcomputable numbering
CEA Operators and the Ershov Hierarchy
Arslanov M.M., Batyrshin I.I., Yamaleev M.M.
We examine the relationship between the CEA hierarchy and the Ershov hierarchy within $\Delta_2
Computable numberings of families of low sets and Turing jumps in the Ershov hierarchy
Faizrahmanov M.
belonging to a fixed level of the Ershov hierarchy, and we deduce existence of a Σcomputable numbering
Decomposability of low 2-computably enumerable degrees and turing jumps in the ershov hierarchy
Faizrakhmanov M.
degrees whose jumps belong to the corresponding Δ-level of the Ershov hierarchy. © Allerton Press, Inc
Classifying equivalence relations in the Ershov hierarchy
Bazhenov N., Mustafa M., San Mauro L., Sorbi A., Yamaleev M.
-degrees to the Δ20 case. In doing so, we rely on the Ershov hierarchy. For any notation a for a non-zero computable
Splitting and nonsplitting in the Σ2 0 enumeration degrees
Arslanov M., Cooper S., Kalimullin I., Soskova M.
of the enumeration degrees, for which the Ershov hierarchy provides an informative setting. The main results below
Splitting and nonsplitting in the Σ2 0 enumeration degrees
Arslanov M., Cooper S., Kalimullin I., Soskova M.
of the enumeration degrees, for which the Ershov hierarchy provides an informative setting. The main results below
On the Problem of Definability of the Computably Enumerable Degrees in the Difference Hierarchy
Arslanov M., Yamaleev M.
in the difference hierarchy (degrees of sets from finite levels of the Ershov difference hierarchy) are studied
Computable Linear Orders and the Ershov Hierarchy
Computable Linear Orders and the Ershov Hierarchy
Structural properties of Q-degrees of n-c. e. sets
Arslanov M., Batyrshin I., Omanadze R.
Ershov hierarchy

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