| 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 |
| erasing | wlstatus | c | wlstatus |
| erroneous | wlstatus | c | wlstatus |
| free | wlstatus | c | wlstatus |
| m | nat-basic | v | nat |
| n | nat-basic | v | nat |
| n0 | nat-basic | v | nat |
| n1 | nat-basic | v | nat |
| nat | nat-basic | s | |
| stat | wlstatus | v | wlstatus |
| used | wlstatus | c | wlstatus |
| wlstatus | wlstatus | s |