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math.LO2008
Borel-amenable Reducibilities for Sets of Reals
Luca Motto Ros
We show that if 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…
math.LO2008
A new characterization of Baire class 1 functions
L. Motto Ros
We give a new characterization of the Baire class 1 functions (defined on an ultrametric space) by proving that they are exactly the pointwise limits of sequences of full functions…