摘要
1 Introduction and Theorem The concept of the Pseudo Jump Operator is defined in [1], and the following two propositions are also shown in [1]. Proposition 1. For each e, there exists nonrecursive r.e. set A such that AW_e^A≡_TK. Proposition 2. For each e and each r.e. set B, if. B is of low degree, then there
基金
Research was supported by the NSF grant JJ890406
the Youth NSF grant JJ890407 of China
by the Pure and Applied Sciences Foundation grant JJ910408 of Yunnan Province of China.
