Π^0_1 classes, strong minimal covers and hyperimmune-free degrees

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We investigate issues surrounding an old question of Yates' as to the existence of a minimal Turing degree with no strong minimal cover, specifically with respect to the hyperimmune-free degrees.
Bulletin of the London Mathematical Society (to appear in Dec 07 issue online)

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Logic, 03D28

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http://salesiana.dossiersoluciones.com/handle/123456789/141300

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0711.0287
 http://arxiv.org/abs/0711.0287

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arXiv