- Syntax of IEL
- Natural Deduction for IEL
- Kripke-Models
- Classical Strong Completeness
- Sequent Calculus for IEL
- Decidability of IEL
- Structural Properties for Permutation-based sequent calculi
- Permutation Based Cut-elimination for K
- Case study: The classical modal logic K
- Miscellaneous
- Additional Lemmas about Permutations
- Constructive Completeness
- Constructive Finite Model Property
- Semantic Cut-Elimination (following Su & Sano )