Shows that dilator-based and Spector-class generalizations of ordinal analysis are entangled via Σ¹₂-proof theory.
Well ordering principles and Π1 4-statements: a pilot study
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Proof-theoretic dilator and intermediate pointclasses
Shows that dilator-based and Spector-class generalizations of ordinal analysis are entangled via Σ¹₂-proof theory.