Remote Access Proceedings of the American Mathematical Society
Green Open Access

Proceedings of the American Mathematical Society

ISSN 1088-6826(online) ISSN 0002-9939(print)

 

 

Proof of a conjecture of Friedman


Author: Donald A. Martin
Journal: Proc. Amer. Math. Soc. 55 (1976), 129
MSC: Primary 02F35
DOI: https://doi.org/10.1090/S0002-9939-1976-0406785-9
MathSciNet review: 0406785
Full-text PDF Free Access

Abstract | References | Similar Articles | Additional Information

Abstract: We prove that every uncountable hyperarithmetic set has a member of each hyperdegree $ \geqslant {\mathbf{0}}$, the hyperdegree of Kleene's 0.


References [Enhancements On Off] (What's this?)


Similar Articles

Retrieve articles in Proceedings of the American Mathematical Society with MSC: 02F35

Retrieve articles in all journals with MSC: 02F35


Additional Information

DOI: https://doi.org/10.1090/S0002-9939-1976-0406785-9
Article copyright: © Copyright 1976 American Mathematical Society