Browsing by Subject "Isolated degrees"

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  • Batyrshin I. (2009)
    We show that non-isolated from below 2-c.e. Q-degrees are dense in the structure of c.e. Q-degrees. We construct a 2-c.e. Q-degree, which can't be isolated from below not only by c.e. Q-degrees, but by any Q-degree. We ...

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