On some reducibility and existential interpretability of structures


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Abstract

We prove the embeddability of the structure of Turing degrees into the structure of degrees of existential interpretability. The notion of weakly bounded Turing reducibility (wbT-reducibility) arises in the proof naturally. We demonstrate that this reducibility is situated strictly between the bounded truth-table reducibility and Turing reducibility and differs from the truth-table reducibility.

About the authors

A. S. Morozov

Sobolev Institute of Mathematics

Author for correspondence.
Email: morozov@math.nsc.ru
Russian Federation, Novosibirsk


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