00721nam a2200217Ia 450000500170000000800460001703700100006304000080007304000080008104000080008904100080009704100080010508400080011310000200012124501690014126000090031085600620031994200100038199900210039195200910041220260320201709.0008  262003s9999    xx            000 0 eng d  aEBOOK  aCRL  beng  cCRL  2eng  aeng  qCRL  aDowney91135699 2aA Hierarchy of Turing Degrees: A Transfinite Hierarchy of Lowness Notions in the Computably Enumerable Degrees, Unifying Classes, and Natural Definability (AMS-206)  bIEEE  uhttps://ieeexplore.ieee.org/servlet/opac?bknumber=9452519  cEBOOK  c1722980d1722980  00104070aCRLbCRLd2026-03-20l0pCL2127074r2026-03-20 20:17:09w2026-03-20yEBOOK