There is no plus-capping degree

Archive for Mathematical Logic 33 (2):109-119 (1994)
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Abstract

Answering a question of Per Lindström, we show that there is no “plus-capping” degree, i.e. that for any incomplete r.e. degreew, there is an incomplete r.e. degreea>w such that there is no r.e. degreev>w witha∩v=w

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References found in this work

On certain lattices of degrees of interpretability.Per Lindström - 1984 - Notre Dame Journal of Formal Logic 25 (2):127-140.
Non-bounding constructions.J. R. Shoenfield - 1990 - Annals of Pure and Applied Logic 50 (2):191-205.

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