object fol2
Provides a simple intuitionistic proof of ¬p ∨ p ⊢ ¬¬p → p. Applying the CERES method will create a non-intuitionistic proof but reductive cut-elimination will always create an intuitionistic one. Therefore this is an example that CERES produces cut-free proofs which reductive cut-elimination cannot.
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- fol2.scala
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- val cut_left: OrRightRule
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This is the API documentation for GAPT.
The main package is at.logic.gapt.