DSpace Repository :: Browsing Articles by Author "Badaev, S. A."

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Open Access
Families without minimal numberings
(2014) Abeshev, K. Sh.; Badaev, S. A.; Mustafa, M.
Open Access
Friedberg numberings in the Ershov hierarchy
(2014) Badaev, S. A.; Mustafa, M.; Sorbi, Andrea
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.