A hierarchy of Turing degrees: a transfinite hierarchy of lowness notions in the computably enumerable degrees, unifying classes, and natural definability/
Rod Downey, Noam Greenberg.
- viii, 222 pages: illustrations; 24 cm.
- Annals of mathematics studies; number 206 .
- Annals of mathematics studies; no. 206. .
Includes bibliographical references (pages [215]-222).