Strong Minimal Covers and a Question of Yates: the Story so Far
نویسنده
چکیده
An old question of Yates as to whether all minimal degrees have a strong minimal cover remains one of the longstanding problems of degree theory, apparently largely impervious to present techniques. We survey existing results in this area, focussing especially on some recent progress.
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Π1 Classes, Strong Minimal Covers and Hyperimmune-free Degrees
We investigate issues surrounding an old question of Yates’ as to the existence of a minimal degree with no strong minimal cover, specifically with respect to the hyperimmune-free degrees.
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