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Symmetric Enumeration Reducibility

机译:对称枚举约简

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Symmetric Enumeration reducibility (≤ _(se)) is a subrelation of Enumeration reducibility (≤ _e) in which both the positive and negative information content of sets is compared. In contrast with Turing reducibility (≤ _T) however, the positive and negative parts of this relation are separate. A basic classification of ≤ _(se) in terms of standard reducibilities is carried out and it is shown that the natural embedding of the Turing degrees into the Enumeration degrees easily translates to this context. A generalisation of the relativised Arithmetical Hierarchy is achieved by replacing the relation c.e. in by ≤ _e and ≤ _T by ≤ _(se) in the underlying framework of the latter.
机译:对称枚举可约性(≤_(se))是枚举可约性(≤_e)的子关系,其中比较集合的正信息内容和负信息内容。但是,与图灵可简化性(≤_T)相比,该关系的正负部分是分开的。根据标准可归约性对≤_(se)进行了基本分类,结果表明,图灵度向枚举度的自然嵌入很容易转化为这种情况。通过替换关系c.e,可以实现相对论的算术层次结构的一般化。在后者的基本框架中,in≤_e且≤_T≤_(se)。

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