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Turing Degrees in Refinements of the Arithmetical Hierarchy
Selivanov V., Yamaleev M.
of characterizing proper levels of the fine hierarchy (up to Turing equivalence). It is known that the fine
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 reducibility in the fine hierarchy
Melnikov A.G., Selivanov V.L., Yamaleev M.M.
sets to extend the Ershov hierarchy beyond Δ20 sets. Similar to the Ershov hierarchy, Selivanov's fine
Multi-criterial method. Analytic hierarchy process
Muomah Chinedum Frederick
The analytic hierarchy process (AHP) is a structured technique for organizing and analyzing complex
Statistical observations on hierarchies of transitivity
Aldai G., Wichmann S.
there is statistical support for a transitivity hierarchy viewed as an implicational hierarchy. To that end we
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
Personality Behavior In A Hierarchy Based On Mutual Perceptions
Smarzhevskiy I.A.
behavior in a hierarchy is given. Decisions on belonging to organizational units (groups) are made
Turing jumps in the Ershov hierarchy
Faizrakhmanov M.
We look at infinite levels of the Ershov hierarchy in the natural system of notation, which
Relative enumerability in Ershov's hierarchy
Batyrshin I.
Generalizations to various levels of Ershov's hierarchy of the relationship between n
Turing and enumeration jumps in the Ershov hierarchy
Faizrahmanov M., Kalimullin I.
hierarchy. © 2010 The Author. Published by Oxford University Press. All rights reserved.

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