Barmpalias, George; Lewis, Andrew E. M. The ibT degrees of computably enumerable sets are not dense. (English) Zbl 1140.03016 Ann. Pure Appl. Logic 141, No. 1-2, 51-60 (2006). Reviewer: Roland Sh. Omanadze (Tbilisi) MSC: 03D25 03D30 × Cite Format Result Cite Review PDF Full Text: DOI
Berry, John W. Almost recursively enumerable sets. (English) Zbl 0309.02038 Trans. Am. Math. Soc. 164, 241-253 (1972). MSC: 03D25 × Cite Format Result Cite Review PDF Full Text: DOI
Degtev, A. N. Remarks on retracable, regressive, and pointwise-decomposable sets. (English. Russian original) Zbl 0239.02023 Algebra Logic 9(1970), 390-395 (1972); translation from Algebra Logika 9, 651-660 (1970). MSC: 03D25 × Cite Format Result Cite Review PDF Full Text: DOI
Appel, K. I.; McLaughlin, T. G. On properties of regressive sets. (English) Zbl 0192.05202 Trans. Am. Math. Soc. 115, 83-93 (1965). × Cite Format Result Cite Review PDF Full Text: DOI