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Browsing Mathematics by Author "Badaev, S. A."

Browsing Mathematics by Author "Badaev, S. A."

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  • Families without minimal numberings 
    Abeshev, K. Sh.; Badaev, S. A.; Mustafa, M. (2014)
  • Friedberg numberings in the Ershov hierarchy 
    Badaev, S. A.; Mustafa, M.; Sorbi, Andrea (2014)
    We show that for every n 1, there exists a 􀀀1n -computable family which up to equivalence has exactly one Friedberg numbering which does not induce the least element of the corresponding Rogers semilattice.