Approximation representations for reals and their wtt‐degrees
George Barmpalias · Mathematical logic quarterly · 2004
Abstract We study the approximation properties of computably enumerable reals. We deal with a natural notion of approximation representation and study their wtt‐degrees. Also, we show that a single representation may correspond to a quite diverse variety of reals. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)