| Symbol | Specification | Kind | Type |
|---|---|---|---|
| . + . | nat-basic | f | Nat × Nat → Nat |
| . ++ . | infset-basic | f | Iset[A] × A → Iset[A] |
| . +1 | nat-basic | f | Nat → Nat |
| . - . | nat | pf | Nat × Nat → Nat with λ n, m. n ≥ m |
| . -- . | infset-union | f | Iset[A] × A → Iset[A] |
| . -1 | nat-basic | pf | Nat → Nat with λ n. n ≠ 0 |
| . < . | nat-basic | p | Nat × Nat |
| . > . | nat | p | Nat × Nat |
| . \ . | infset-union | f | Iset[A] × Iset[A] → Iset[A] |
| . ∈ . | infset-basic | p | 'A × Iset('A) |
| . ∩ . | infset-union | f | Iset[A] × Iset[A] → Iset[A] |
| . ∪ . | infset-union | f | Iset[A] × Iset[A] → Iset[A] |
| . ≤ . | nat | p | Nat × Nat |
| . ≥ . | nat | p | Nat × Nat |
| . ⊆ . | infset-basic | p | Iset('A) × Iset('A) |
| { . } | infset-basic | f | (A → Bool) → Iset[A] |
| { . } | infset-union | f | A → Iset[A] |
| χ | infset-basic | f | Iset[A] → A → Bool |
| ∅ | infset-basic | c | Iset[A] |
| Iset | infset-basic | s | |
| Nat | nat-basic | s | |
| a | infset-union | v | A |
| b | infset-union | v | A |
| c | infset-union | v | A |
| s | infset-union | v | Iset[A] |