Wadge Degrees

Some articles on wadge degrees, wadge, degree:

Wadge Hierarchy - Wadge Degrees
... is Wadge reducible to or ≤W if there is a continuous function on ωω with ... The Wadge order is the preorder or quasiorder on the subsets of Baire space ... of sets under this preorder are called Wadge degrees, the degree of a set is denoted by W ...

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