New Degree Spectra of Abelian Groups
نویسنده
چکیده
We show that for every computable ordinal of the form β = δ + 2n + 1 > 1, where δ is zero or a limit ordinal and n ∈ ω, there exists a torsion-free abelian group having an X-computable copy if, and only if, X is non-lowβ .
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عنوان ژورنال:
- Notre Dame Journal of Formal Logic
دوره 58 شماره
صفحات -
تاریخ انتشار 2017