| Some definitions of interest. |
|
productively_infinite | Def Infinite(A) ==  ( inj A) |
| | Thm* A:Type. Infinite(A) Prop |
|
unboundedly_infinite | Def Unbounded(A) == k: .  ( k inj A) |
| | Thm* A:Type. Unbounded(A) Prop |
|
injection_type | Def A inj B == {f:(A B)| Inj(A; B; f) } |
| | Thm* A,B:Type. A inj B Type |
|
int_seg | Def {i..j } == {k: | i k < j } |
| | Thm* m,n: . {m..n } Type |
|
nat | Def == {i: | 0 i } |
| | Thm* Type |