%0 Book Section
%U https://doi.org/10.1515/9780691200217-fm
%B A Hierarchy of Turing Degrees
%B A Transfinite Hierarchy of Lowness Notions in the Computably Enumerable Degrees, Unifying Classes, and Natural Definability (AMS-206)
%T Frontmatter
%A Rod Downey
%A Noam Greenberg
%D 2020
%I Princeton University Press
%C Princeton
%P i-vi
%R doi:10.1515/9780691200217-fm
%@ 9780691200217
%[ 2026-05-03