00979nam0-22003611i-450-99000098949040332120071210141403.03-540-09710-4000098949FED01000098949(Aleph)000098949FED0100009894920001205d1979----km-y0itay50------baengDEy-------001yyDegrees of unsolvabilitystructure and theoryRichard L. EpsteinBerlin [etc.]Springer-Verlag1979XIV, 240 p.ill.24 cmLecture notes in mathematics759LogicaRicorsività160Epstein,Richard L.46609ITUNINARICAUNIMARCBK9900009894904033217-21911311FI1C-20-(75919900MA1FI1MA1Degrees of unsolvability81037UNINA