Undecidability of the structure of the Solovay degrees of c.e. reals

Rodney G. Downey, Denis R. Hirschfeldt, Geoffrey LaForte. Undecidability of the structure of the Solovay degrees of c.e. reals. J. Comput. Syst. Sci., 73(5):769-787, 2007. [doi]

Abstract

Abstract is missing.