Borel-amenable Reducibilities for Sets of Reals

preprint2008arXivOpen access

Abstract

We show that if F\mathcal{F} is any "well-behaved" subset of the Borel functions and we assume the Axiom of Determinacy then the hierarchy of degrees on $\pow(\mathbb{R})$ induced by F\mathcal{F} turns out to look like the Wadge hierarchy (which is the special case where F\mathcal{F} is the set of continuous functions).

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