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In this paper we present the proof that there is no elementary translation from cut- free derivations in the sequent calculus variant of the epsilon calculus to LK-proofs with bounded cut-complexity. This is a partial answer to a question by Toshiyasu Arai. Fur- thermore, we show that the intuitionistic format of the sequent calculus variant of the epsilon calculus is not sound for intuitionistic logic, due to the presence of all classical quantifier-shift rules.
Baaz et al. (Mon,) studied this question.
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