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APAL
2007
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APAL 2007
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On definable filters in computably enumerable degrees
14 years 19 days ago
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logic.sysu.edu.cn
Based on a result of Nies on definability the upper semilattice of computably enumerable degrees (denoted by R), we find that in R filters generated by definable subsets are al...
Wei Wang, Decheng Ding
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