Propositions are α-decidable for Brouwer ordinals α, generalizing decidability with closure under conjunction and ω²-decidability for countable meets of semidecidable properties.
PhD thesis, Tallinn University of Technology, 2017
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Generalized Decidability via Brouwer Trees
Propositions are α-decidable for Brouwer ordinals α, generalizing decidability with closure under conjunction and ω²-decidability for countable meets of semidecidable properties.