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Kihara–Gregoriades–Kechris conjecture on Borel amenable classes
Borel amenable class conjecture. For the relevant ordinals $\alpha$ , one has
Conjectureopenborel-functions descriptive-set-theory wadge-degreesarXiv posted 2 days ago

Kihara–Gregoriades–Kechris conjecture on Borel amenable classes