| Symbol | Specification | Kind | Type |
|---|---|---|---|
| . + . | nat-basic2 | f | nat × nat → nat |
| . +1 | nat-basic1 | f | nat → nat |
| . - . | nat | f | nat × nat → nat |
| . -1 | nat-basic1 | f | nat → nat |
| . < . | nat-basic1 | p | nat × nat |
| . > . | nat | p | nat × nat |
| . ≤ . | nat | p | nat × nat |
| . ≥ . | nat | p | nat × nat |
| fail | nat_or_fail | c | nat_or_fail |
| m | nat-basic2 | v | nat |
| m0 | nat_or_fail | v | nat |
| n | nat-basic1 | v | nat |
| n0 | nat-basic1 | v | nat |
| n1 | nat-basic1 | v | nat |
| nat | nat-basic1 | s | |
| nat_or_fail | nat_or_fail | s | |
| norfail | nat_or_fail | v | nat_or_fail |
| some | nat_or_fail | f | nat → nat_or_fail |
| the | nat_or_fail | f | nat_or_fail → nat |