- Base Library for ICL
- SAT Solver
- Axiomatic Equivalence
- Strictly sorted lists are identical if they are equivalent
- Preliminaries
- Set Theory
- Empty set and adjunction
- Numerals
- Finite sets
- Hereditarily finite sets
- Well-founded sets
- HFT characterisation of numerals
- Union
- Replacement and Separation
- Diaconescu's Theorem
- Power
- Subsets of Finite Sets
- Towers
- Ordinals
- WFT Characterisation of Ordinals
- Finite Ordinals
- Cumulative Hierarchy
- Finite Stages
- Closures and Infinity
- Well-Ordering Theorem
- Regularity
- Complete Induction for Numbers
- Well-Orderings on Types
- Well-Founded Relations