| Symbol | Specification | Kind | Type |
|---|---|---|---|
| # . | natset | f | natset → nat |
| . + . | nat-basic | f | nat × nat → nat |
| . ++ . | natset | f | natset × nat → natset |
| . +1 | nat-basic | f | nat → nat |
| . - . | nat | pf | nat × nat → nat with λ n, m. n ≥ m |
| . -- . | natset | f | natset × nat → natset |
| . -1 | nat-basic | pf | nat → nat with λ n. n ≠ 0 |
| . < . | nat-basic | p | nat × nat |
| . > . | nat | p | nat × nat |
| . \ . | natset | f | natset × natset → natset |
| . ∈ . | natset | p | nat × natset |
| . ∩ . | natset | f | natset × natset → natset |
| . ∪ . | natset | f | natset × natset → natset |
| . ≤ . | nat | p | nat × nat |
| . ≥ . | nat | p | nat × nat |
| . ⊆ . | natset | p | natset × natset |
| . to . | natset | f | nat × nat → natset |
| { . } | natset | f | nat → natset |
| ∅ | natset | c | natset |
| m | natset | v | nat |
| n | natset | v | nat |
| nat | nat-basic | s | |
| natset | natset | s | |
| ns | natset | v | natset |