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JOURNALS // Algebra i logika // Archive

Algebra Logika, 2011 Volume 50, Number 4, Pages 504–520 (Mi al498)

This article is cited in 4 papers

Strongly $\eta$-representable degrees and limitwise monotonic functions

M. V. Zubkov

N. G. Chebotarev Research Institute of Mathematics and Mechanics, Kazan (Volga Region) Federal University, Kazan, Russia

Abstract: It is proved that each strongly $\eta$-representable degree contains a set that is a range of values for some $\boldsymbol0'$-limitwise monotonic function pseudoincreasing on $\mathbb Q$. Thus we obtain a description of strongly $\eta$-representable degrees in terms of $\boldsymbol0'$-limitwise monotonic functions.

Keywords: $\eta$-representable degree, $\boldsymbol0'$-limitwise monotonic function.

UDC: 510.53+512.562

Received: 01.10.2009
Revised: 02.02.2011


 English version:
Algebra and Logic, 2011, 50:4, 346–356

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© Steklov Math. Inst. of RAS, 2024