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Properly Σ2 minimal degrees and 0″ complementation

✍ Scribed by S. Barry Cooper; Andrew E. M. Lewis; Yue Yang

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
96 KB
Volume
51
Category
Article
ISSN
0044-3050

No coin nor oath required. For personal study only.

✦ Synopsis

We show that there exists a properly Σ2 minimal (Turing) degree b, and moreover that b can be chosen to join with 0 to 0 -so that b is a 0 complement for every degree a such that 0 ≤ a < 0 .

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