Badaev S. A., Podzorov S. Yu.
Minimal coverings in the Rogers semilattices of Σ n0-computable
numberings
Under study is the problem of existence of minimal and strong minimal
coverings in Rogers semilattices of Σ n0-computable
numberings for n≥2. Two sufficient conditions for existence of minimal
coverings and one sufficient condition for existence of strong minimal
coverings are found. The problem is completely solved of existence of
minimal coverings in Rogers semilattices of Σ n0-computable
numberings of a finite family.