| Symbol | Specification | Kind | Type |
|---|---|---|---|
| # . | set-basic | f | Set → Nat |
| . + . | nat-basic | f | Nat × Nat → Nat |
| . ++ . | set-basic | f | Set × Elem → Set |
| . +1 | nat-basic | f | Nat → Nat |
| . - . | nat | pf | Nat × Nat → Nat with λ n, m. n ≥ m |
| . -1 | nat-basic | pf | Nat → Nat with λ n. n ≠ 0 |
| . < . | nat-basic | p | Nat × Nat |
| . > . | nat | p | Nat × Nat |
| . ∈ . | set-basic | p | Elem × Set |
| . ≤ . | nat | p | Nat × Nat |
| . ≥ . | nat | p | Nat × Nat |
| . ⊆ . | set-basic | p | Set × Set |
| ∅ | set-basic | c | Set |
| Elem | elem | s | |
| Nat | nat-basic | s | |
| Set | set-basic | s | |
| a | set-basic | v | Elem |
| b | set-basic | v | Elem |
| c | set-basic | v | Elem |
| n | set-basic | v | Nat |
| s | set-basic | v | Set |