| 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 |
| . .elem | elem-index | f | elem-index → elem |
| . .elem:= . | elem-index | f | elem-index × elem → elem-index |
| . .idx | elem-index | f | elem-index → nat |
| . .idx:= . | elem-index | f | elem-index × nat → elem-index |
| . < . | nat-basic | p | nat × nat |
| . > . | nat | p | nat × nat |
| . ≤ . | nat | p | nat × nat |
| . ≥ . | nat | p | nat × nat |
| a | elem | v | elem |
| a0 | elem-index | v | elem |
| b | elem | v | elem |
| c | elem | v | elem |
| ei | elem-index | v | elem-index |
| elem | elem | s | |
| elem-index | elem-index | s | |
| elemindex | elem-index | f | elem × nat → elem-index |
| m | nat-basic | v | nat |
| m0 | elem-index | v | nat |
| n | nat-basic | v | nat |
| n0 | nat-basic | v | nat |
| n1 | nat-basic | v | nat |
| nat | nat-basic | s |