$\sum_{0}^{n}$ -Equivalence Relations

Studia Logica 41 (4):351 - 358 (1982)
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Abstract

In this paper we study the reducibility order $\leq _{m}$ (defined in a natural way) over $\sum_{n}^{0}$ equivalence relations. In particular, for every n > 0 we exhibit $\sum_{n}^{0}$ -equivalence relations which are complete with respect to $\leq _{m}$ and investigate some consequences of this fact (see Introduction).

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