author = { Downey, R. G. AND Greenberg, Noam },

title = { A hierarchy of Turing degrees a transfinite hierarchy of lowness notions in the computably enumerable degrees, unifying classes, and natural definability (AMS-206) },

publisher = {Princeton University Press},

isbn = {9780691200217},

keywords = { Computable functions , Recursively enumerable sets , Unsolvability (Mathematical logic) , MATHEMATICS / Logic },

year = {[2020]},

booktitle = {Annals of Mathematics Studies ; 206},

address = { Princeton, NJ },