CEA Operators and the Ershov Hierarchy

Arslanov, MM; Batyrshin, II; Yamaleev, MM

Arslanov, MM (corresponding author), Kazan Fed Univ, 18 Kremlyovskaya Str, Kazan 420008, Russia.

RUSSIAN MATHEMATICS, 2021; 65 (8): 63

Abstract

We examine the relationship between the CEA hierarchy and the Ershov hierarchy within Delta(0)(2) Turing degrees. We study the long-standing problem r......

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