Polyakov, E. A.; Rozinas, M. G. Reduzibilität nach Aufzählbarkeit. (Russian) Zbl 0377.02029 Sib. Mat. Zh. 18, 838-845 (1977). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 ReviewCited in 1 Document MSC: 03D60 Computability and recursion theory on ordinals, admissible sets, etc. 03D99 Computability and recursion theory PDFBibTeX XMLCite \textit{E. A. Polyakov} and \textit{M. G. Rozinas}, Sib. Mat. Zh. 18, 838--845 (1977; Zbl 0377.02029)