| Symbol | Specification | Kind | Type |
|---|---|---|---|
| . + . | nat-basic | f | Nat × Nat → Nat |
| . +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 |
| . ≤ . | nat | p | Nat × Nat |
| . ≥ . | nat | p | Nat × Nat |
| Elem | elem | s | |
| Nat | nat-basic | s | |
| inv | rtc-rel | p | Elem × (Elem → Type(Bool)) |
| p | elem-rel | p | Elem × Elem |
| p* | rtc-rel | p | Elem × Elem |
| p+ | rtc-rel | p | Elem × Elem |
| pelem | rtc-rel | v | Elem → Bool |
| rtc | rtc-rel | p | Nat × Elem × Elem |