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4 Members of Deep Π0 1 classes


By Lemma 3, we can conclude that X is order-deep.
One immediate consequence of Theorem 9 is the following.

The converse of this result does not hold.




As an immediate consequence of Theorem 9 and the above results from [BP16], we have:




Next, we have:




This paper is available on arxiv under CC BY 4.0 DEED license.
Authors:
(1) Laurent Bienvenu;
(2) Christopher P. Porter.
