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math.LO2026
Intuitionistic Common Knowledge
Lukas Zenger
We study an intuitionistic version of common knowledge logic (CK), called ICK, which was introduced by Jäger and Marti. ICK extends intuitionistic propositional logic (IPL) by mul…
math.LO2025
Coalgebraic proof translations for non-wellfounded proofs
Borja Sierra Miranda, Thomas Studer, Lukas Zenger
Non-wellfounded proof theory results from allowing proofs of infinite height in proof theory. To guarantee that there is no vicious infinite reasoning, it is usual to add a constra…